Lạng Sơn Province
|Lạng Sơn Province
Tỉnh Lạng Sơn
Location of Lạng Sơn within Vietnam
|• Total||8,327.6 km2 (3,215.3 sq mi)|
|• Density||91/km2 (240/sq mi)|
|• Ethnicities||Vietnamese, Tày, Dao, Nùng|
|Time zone||ICT (UTC+7)|
|ISO 3166 code||VN-09|
Lạng Sơn ( listen) is a province in far northern Vietnam, bordering Guangxi province in China. Its capital is also called Lạng Sơn, which is a strategically important town at the border with China and is 137 kilometres (85 mi) northeast of Hanoi connected by rail and road. Lạng Sơn Province is bounded by China in the north, Cao Bằng Province borders the northwest, Ha Bac Province on the south, Quảng Ninh Province starting on the south and extending to the eastern border and Thái Nguyên Province to the west. The province covers an area of 8327.6 square kilometres and as of 2008 it had a population of 759,000 people.
Lạng Sơn Province, Hà Giang, Lào Cai, Bắc Giang, Bắc Kạn, Cao Bằng, Phú Thọ, Quảng Ninh, Thái Nguyên, Tuyên Quang and Yên Bái of the Northeast (Đông Bắc) region) are all part of the 59 administrative provinces and 5 municipalities in Vietnam.
Ancient history of the province is linked to the Bronze Age when the trade route that existed between China and India that passed from the Red River Delta through Nanning to Guangzhou. The province was one of the 13 original provinces in northern Vietnam created under the reign of Emperor Minh Mạng in 1831.
Friendship Gate, the historical land link between China and Vietnam, links Lạng Sơn and Guangxi, China. Being a border province, it is important for trade between the two countries. It is accessible by road and rail from Hanoi, the Vietnamese capital, and it is the northernmost point on National Road 1A. Lạng Sơn's economy is 80% based on agriculture and forestry. However, in recent years economic development has received full attention to exploit its rich mineral resources.
Important historical places of interest in the province are the war-ravaged Dong Don Border town, which has rich war history and attracts visitors, two large limestone caves within a short distance from the Long Son town, and a 16th-century citadel of the Ming Dynasty.
History of the province is the history of Lạng Sơn town. Ancient history is traced to the Bronze Age. This period is marked by the trade route that existed between China and India that passed from the Red River Delta through Nanning to Guangzhou. 7000–9000 years ago the limestone caves of the province were inhabited by early settlers of the Bac Son culture.
The Dinh kings (968-980) encouraged the growth of trade in the region and requested the Sung emperors of China that they establish trade relations at Yong Zhou. The Chinese Annals have revealed that the Vietnamese traded perfumes, elephant ivories, rhinoceros horns, gold, silver and salt in return for Chinese fabrics. Later, under the Lý Dynasty an extensive market was established at Vĩnh Bình on the Kỳ Cùng River.
On 4 April 1406, as a Chinese Ming envoy crossed the border into Lạng Sơn, Hồ Quý Ly's forces ambushed them and killed the Trần prince that the Ming were escorting back. Consequently, the Yongle Emperor (of Ming China) launched a punitive expedition against him due to this hostile act. During the reign of the Ming Dynasty, during the period 1527 and 1592, Lạng Sơn was vastly fortified in view of its strategic importance at the border, which are seen even now; a citadel of this dynasty is located to the west of the Lạng Sơn town on a lime stone rock outcrop.
Lạng Sơn was one of the 13 original provinces in northern Vietnam that were created under the reign of Emperor Minh Mạng in 1831; since the establishment of the Nguyễn Dynasty in 1802 until then, northern Vietnam had been under the rule of a viceroy.
The town was occupied by the French in 1885 when it was a very prosperous town. The French converted it into a military base considered as important to their other base in Cao Bằng. In 1906, archaeologist Henri Mansuy discovered the Tham Kanh cave near Pho Binh Gia which he named the Ho Binh Gia. He unearthed unique stone implements and human remains. In 1922-25 M. Coloni extensively explored Lạng Sơn Province and identified 43 sites related to the ancient Bac Son culture in the mountains.
During the Second World War, even though the Japanese had signed an agreement with Vichy Indo China, they soon reneged on the Agreement, without waiting for the ink to dry on the accord, and launched an offensive on Vietnam by withdrawing their troops from China. They crossed the Vietnam China border and entered 12 kilometres (7.5 mi) inside, very close to the Lạng Sơn railway station. The Japanese attacked on 22 September 1940 and by the 25th they captured Lạng Sơn. However, Vichy had lodged a protest with Emperor Hirohito for the breach of the agreement signed between the two countries, which resulted in a ceasefire to the hostilities by the evening of 26 September, and soon Lạng Sơn was reoccupied by the Vichy forces.
After Ho Chi Minh's government was established in September 1945, Japanese had surrendered to the British and Indian Army, under the terms of the Potsdam Conference, to the south of the 16th parallel, while the Chinese Nationalist Party (the Kuomintang). As strategy, Ho Chi Minh entered into an agreement with the French so that he could face any threat from the Chinese and a Franco-Vietnamese agreement was signed. This provided for a free Vietnam within the French Union and the Indochinese federation. However, the French launched an offensive against the Viet Minh in October 1947 with Lạng Sơn as a their base. However, the Viet Minh managed to thwart the French Offensive and forced the French to withdraw to Lạng Sơn. However, the Viet Minh pursue the French Army, they had a very decisive victory on Highway 4 and they had to finally withdraw from Lạng Sơn. This marked the beginning of First Indochina War
In 1950 the Vietminh took control of the province and the town. During February 1979, the Chinese invaded Vietnam through the border town of Don Dong (18 kilometres (11 mi) to the north of Long Son town). In this war, which lasted for five days, 600,000 soldiers had descended on Vietnam; Lạng Sơn town was the major town that received the major thrust of 200,000 soldiers from China and occupied the capital city of the Northern Province. However, the Vietnamese had the last say as the Vietnamese army was successful in defeating the Chinese army, which bid a hasty retreat. This was has achieved the status of a folk lore in the province. The frontier village, which became famous during the war with China, has remnants of the war on display to the visitors. However the border has been rebuilt and brisk trade flourishes between Vietnam and China through this town. During the Chinese invasion in 1959 the Lan Son town was also severely damaged, however it has been rebuilt since then. The old part of the town, near the Kyu Kung River has some interesting historical sites.
On June 7, 1949, the district of Lộc Bình was transferred from Hải Ninh Province into Lạng Sơn. During the First Indochina War, Lạng Sơn was a part of Liên khu Việt Bắc. In 1950 the province had 10 districts: Bằng Mạc, Bắc Sơn, Bình Gia, Cao Lộc, Điềm He, Lộc Bình, Ôn Châu, Thoát Lãng, Tràng Định and Văn Uyên. On July 1, 1956, the district of Hữu Lũng of Bắc Giang Province was transferred into Lạng Sơn, which was placed in the Khu tự trị Việt Bắc (Region of Northern Vietnam), which was formed the same day. The RNV lasted until December 27, 1975. In 1963 agricultural cooperativization began between the nationalities of the province. On December 16, 1964, the district of Điềm He and six communes of Bằng Mạc were merged to form the new district of Văn Quan; at the same time, the district of Ôn Châu and eight communes of Bằng Mạc district came together to form the new district of Chi Lăng. From December 27, 1975 until December 29, 1978, Lạng Sơn and Cao Bằng Provinces were merged to form Cao Lạng Province, before being re-partitioned. At the same time, the district of Đình Lập in Quảng Ninh Province was transferred to Lạng Sơn, and since then it has had its current 10 districts. In 1979, a Chinese attack on the border was defended.
The province is set in karstic limestone mountains and valleys. Mountains and forests comprise 80% of the province's area. The province measures approximately 123 kilometres from north to south and 126 kilometres from west to east. The average altitude of the province is 252 metres (827 ft) above sea level. The lowest point in the province is 20 metres (66 ft) towards the south of Hữu Lũng District and the highest point is at Mẫu Sơn Mountain, which is 1,541 metres (5,056 ft). Mẫu Sơn is to the east of the town of Lạng Sơn by 30 kilometres (19 mi), and is surrounded by a series of small peaks; snow falls on these peaks in winter. The Bac Son Mountains are located in the province and are calcareous in nature. Fertile valley are framed by high mountain ridges, creating a scenic landscape.
The north of the province adjoins Cao Bằng Province. The 243 kilometres (151 mi) Kỳ or Kyu River flows through Lạng Sơn town and alluvial plains are formed in the valley that is surround by high mountains of about 1,000 metres (3,300 ft) height. The Kỳ has a basin area of 6,660 square kilometres (2,570 sq mi), and has its source in the mountainous area of Bắc Xa at an altitude of 1,166 metres (3,825 ft) in the district of Đình Lập. The river is part of the Tây Giang River basin in China. The Bản Thín River, a tributary of the Kỳ Cùng, which is 52 metres (171 ft) long with a catchment area of 320 square kilometres (120 sq mi) has its source in a mountainous region in Guangxi in China, and empties into the Kỳ Cùng in the commune of Khuất Xá in Lộc Bình Province. Other tributaries of the Kỳ include the Bắc Giang River, which is 114 km long with a catchment area of 2,670 square kilometres (1,030 sq mi) and the Bắc Khê River, which is 54 kilometres (34 mi) long with a catchment area of 801 square kilometres (309 sq mi). Other rivers of note in the province include the Thương Là River, which is the second largest in the province, sourced from the Na Pa Phước range in the district of Chi Lăng and is 157 km long with a basin area of 6,640 square kilometres (2,560 sq mi), the Hoá Độ River, which is 47 kilometres (29 mi) in length with a catchment area of 385 square kilometres (149 sq mi) and the Trung River, which is 35 km in length with a catchment area of1,270 square kilometres (490 sq mi).
Lạng Sơn has two international border crossings. The most accessed is the Friendship Gate called the Hữu Nghị Quan crossing at Đồng Đăng connecting to Pingxiang town in China. This is the historical first land link in the north between China and Vietnam that connects Lạng Sơn and Guangxi, China. The border is open daily, from 07:00 to 17:00 and involves a walk of 500 m through the no man's territory between Vietnam and China. There is an international train service, an express route, opened in 1996 from Hanoi to Beijing (China), which operates twice a week on Tuesday and Friday that passes through Lạng Sơn Town and Đồng Đăng through this gate which has three-hour stop at the border town to complete formalities of entry from one country to the other. Passengers are not allowed to board the train at any intermediate station between Hanoi and Beijing.
Lạng Sơn is 155 kilometres (96 mi) to the northwest of Hanoi and National Highways 1 and 1 A and passes the Chi Lang pass (the site of Lê Lợi's victory over 100,000 Ming invaders from China in 1427) and Bắc Giang on National Highway 1A. Lạng Sơn is 135 km from Cao Bằng on the National Highway no 4.
Lạng Sơn Province has an average annual temperature of 17–22 °C and an average annual rainfall of 1,200–1,600 millimetres (47–63 in). The average temperature in the summer is 28.5 °C (83.3 °F) and 12–13 °C (54–55 °F) in the winter, It has an average humidity of 80–85% and an average of 1600 hours of sunlight a year.
Lạng Sơn has one town municipality, 10 rural districts, five precincts, 14 towns and 207 communes. The 10 districts (huyện): Bắc Sơn District, Bình Gia District, Cao Lộc District, Chi Lăng District, Đình Lập District, Hữu Lũng District, Lộc Bình District, Tràng Định District, Văn Lãng District and Văn Quan District and 207 communes.
|Name||Division type||Population (2003)||Area (km²)||Towns (huyện lỵ or thị trấn) (bold)
and communes (xã)
|Lạng Sơn||City (thành phố)||148,000 (2007)||79|
|Bắc Sơn District||District (huyện)||65,073||698||Bắc Sơn, Long Đống, Quỳnh Sơn, Bắc Sơn, Hữu Vĩnh, Chiêu Vũ, Hưng Vũ, Trấn Yên, Nhất Tiến, Nhất Hòa, Vũ Lăng, Vũ Sơn, Vũ Lễ, Tân Thành, Tân Hương, Tân Lập, Tân Tri, Chiến Thắng, Đồng Ý, Vạn Thủy.|
|Bình Gia District||District (huyện)||54,349||1091||Bình Gia, Tô Hiệu, Hoàng Văn Thụ, Tân Văn, Hồng Thái, Mông Ân, Hồng Phong, Thiện Hòa, Thiện Long, Thiện Thuật, Yên Lỗ, Hưng Đạo, Hoa Thám, Bình La, Minh Khai, Quang Trung, Quý Hòa, Tân Hòa, Hòa Bình, Vĩnh Yên.|
|Cao Lộc District||District (huyện)||75,980||644||Cao Lộc, Đồng Đăng, Tân Thành, Xuân Long, Yên Trạch, Tân Liên, Gia Cát, Cống Sơn, Mẫu Sơn, Xuất Lễ, Cao Lâu, Hải Yến, Lộc Yên, Thanh Lòa, Hòa Cư, Hợp Thành, Thạch Đạn, Bảo Lâm, Thụy Hùng, Song Giáp, Phú Xá, Bình Trung, Hồng Phong.|
|Chi Lăng District||District (huyện)||77,910||703|
|Đình Lập District||District (huyện)||28,125||1183||Đình Lập, Nông Trường Thái Bình, Lâm Ca, Đồng Thắng, Bắc Lãng, Châu Sơn, Cường Lợi, Thái Bình, Đình Lập, Bính Xá, Kiên Mộc, Bắc Xa.|
|Hữu Lũng District||District (huyện)||114,638||805||Hữu Lũng, Hòa Thắng, Minh Hòa, Minh Sơn, Sơn Hà, Hồ Sơn, Tân Thành, Hòa Sơn, Hòa Lạc, Yên Sơn, Cai Kinh, Đồng Tân, Nhật Tiến, Minh Tiến, Đô Lương, Vân Nham, Đồng Tiến, Thanh Sơn, Thiện Ky, Tân Lập, Quyết Thắng, Yên Bình, Hòa Bình, Yên Vượng, Yên Thịnh, Hữu Liên.|
|Lộc Bình District||District (huyện)||80,517||998||Lộc Bình, Na Dương, Ái Quốc, Xuân Dương, Hữu Lân, Nam Quan, Minh Phát, Đông Quan, Hiệp Hạ, Xuân Tình, Như Khuê, Nhượng Bạn, Quan Bản, Lục Thôn, Vân Mộng, Bằng Khánh, Xuân Lễ, Xuân Mãn, Đồng Bục, Hữu Khánh, Mẫu Sơn, Yên Khoái, Tú Mịch, Tú Đoạn, Khuất Xá, Tam Gia, Tĩnh Bắc, Sàn Viên, Lợi Bác.|
|Tràng Định District||District (huyện)||62,869||995||Thất Khê, Khánh Long, Đoàn Kết, Cao Minh, Tân Yên, Vĩnh Tiến, Tân Tiến, Bắc Ái, Kim Đồng, Chí Minh, Chi Lăng, Đề Thám, Hùng Sơn Hùng Việt, Kháng Chiến, Đại Đồng, Tri Phương, Quốc Khánh, Đội Cấn, Tân Minh, Trung Thành, Quốc Việt, Đào Viên.|
|Văn Lãng District||District (huyện)||50,210||561|
|Văn Quan District||District (huyện)||57,050||549||Văn Quan, Hữu Lễ, Tri Lễ, Yên Phúc, Bình Phúc, Lương Năng, Tú Xuyên, Tràng Sơn, Xuân Mai, Tràng Phái, Tân Đoàn, Tràng Các, Đồng Giáp, Chu Túc, Đại An, Văn An, Vĩnh Lai, Hòa Bình, Vân Mộng, Việt Yên, Phú Mỹ, Trấn Ninh, Song Giang, Khánh Khê.|
According to the General Statistics Office of the Government of Vietnam, the population of Lạng Sơn province as on 2008 was 759,000 with a density of 91 persons per sqkm over a total land area of 8,327.6 square kilometres (3,215.3 sq mi) of the province. It is one of the least populated provinces in the Northern midlands and mountain areas of Vietnam. The male population during this period was 370100 with females accounting for 386900. The rural population was 605,600 against an urban population of 153,400 (about 2.5% of the rural population). 
The ethnic groups which inhabit the province are the Viet (Kinh), Tay, Nung, Dao, Mong and San Chay, Ngai and Montagnards who retained their tribal life styles. Nungs comprised 42.97% of the population, followed by Tay people with 35.92%. Ethnic Vietnamese are 16.5%, and the remainder are mostly Dao, Hoa, Sán Chay and Hmong.
Lạng Sơn's economy is 80% based on agriculture and forestry. The province has significant mining reserves of bauxite, phosphate and coal. It also has notable reserves of gold, silver and lead. Main crops include rice, which accounted for 40,000 hectares out of a total of 55,000 hectares grown in 1986, and sweet potato, maize and manioc. It is also known for its commodities of tea and yellow tobacco. These crops are generally grown in the valleys of the Bac Son Mountains, Binh Gia Mountains and the Van Quan Mountains and along the rivers plains of the Ky Cung River and the Thuong River. Some of the districts such as Hữu Lũng District have sugar cane plantations and grow oranges and pineapples, others grow tea and plums. Animal husbandry is developed in Lạng Sơn Province; in 1986, 140,000 buffalo and oxen were recorded in the province and 150,000 pigs. The province is also noted for its That Khe duck speciality.
As against the national figure of 273 agriculture, forestry and fishery cooperatives, 15 are agricultural cooperatives and four are fisheries cooperatives. The number of cooperatives is 32 as against 7592 cooperatives in the country. There are only 26 farms as against the national number of 120699.
Apart from the war-ravaged Dong Don Border town, which has rich war history and attracts visitors, the other historical places of interest in the province are two large limestone caves within a short distance from the Long Son town, and a 16th-century citadel of the Ming Dynasty.
The two caves with Buddhist altars, well illuminated are the Tam Thanh Cave and the Nhi Thanh Cave. The Tam Thanh Cave is very large with three chambers, has water pond, and has a window opening, which provides scenic views of vast rice fields outside. The outer chamber of the cave on the right has the Tam Giao Pagoda (built in 1777) with six shrines. The second chamber of the cave on the left also shrines, the Ngoc Tuyen River flows through this cave into the mountain, an unusual feature which is described as "a dramatic sight." The Nhi Thanh Cave, about 700 m away from the Tam Thanh Cave, was discovered in the 18th century by Ngo Thin Sy, military commander of the Lạng Sơn garrison, whose poems have been inscribed at the entrance to the cave. A plaque erected in the cave depicts a French resident of Long Son in full European dress. The Ngoc Tuyen River flows through the cave.
The Mạc Dynasty Citadel, a 16th-century monument located in a desolate area on a rock outcrop, is bounded by the east-west facing walls and is approached from the Tam Tinh road from Lạng Sơn city. Series of steps from the road lead to the ruins of the citadel.
The Lạng Sơn city also has ancient walls built in the 18th century. A monastery existed here.
The northern mountainous province is rich in biodiversity of flora and fauna in its rich forest. In the karstic limestone formations (also known as carbonate karst), which occupy 5% of the natural forest area of Vietnam Long Son and Cai Bang have an important place in the floral and faunal wealth of the forests. Northeast Viet Nam has 36% of the country's 1.15 million hectares of rocky mountains out of which Lạng Sơn and Cao Bằng provinces account for a substantial part of limestone formations. According to forest statistics of Vietnam these limestone formations have 69 mammal species; five of them are endemic and 26 are rare species. Village people value these formations as they are sources of water for agriculture. They also are sources of fuel wood, medicinal plants and housing materials for the villagers. In Lạng Sơn province they are rich source of water for irrigation of paddy crops. The limestone formations also permit growth of annona trees which provide substantial revenue to the villagers in Lạng Sơn; the average annual net yield from annona is reported to be about VND 12 million (US $775).
- Star anise
The most important tree grown in Vietnam (and also in China) is the star anise (illicium verum, Hooker), an important spice; an evergreen tree which has aromatic lanceolate leaves. The Lạng Sơn Province is the leading province with this tree species growth reported to cover 9000 ha, mostly in its Van Quan District. Other provinces also have this species of trees but the coverage is very limited. Initially the tree belonged to the state farm enterprises under collective farming. However, since the 1990s, it has decontrolled and given the trees to village families to manage. There are plans to enhance the plantation area under this species of tree to 20,000 hectares (49,000 acres). The commercial production of star anise spice, which was 9,896 tonnes in 1997, has recorded a fall to 5,000 tonnes in 1999.
- Merriam-Webster, Inc (1997). Merriam-Webster's geographical dictionary. Merriam-Webster. p. 628. ISBN 0-87779-546-0.
- Boobbyer, Claire (2008). "Footprint Vietnam". Northeast Frontier (Footprint Travel Guides). pp. 136–139. ISBN 1-906098-13-1. Retrieved 2010-08-26.
- "Provinces of North East Region: Lang Son Province". WomPoms Vietnam. Retrieved 2013-06-28.
- "Population and population density in 2008 by province". General Statistics Office of Vietnam. Retrieved September 5, 2010.
- "Vietnam Government Overview". Administrative divisions. Global Security.
- Special issue on Lang Son (1988), p.12
- Special issue on Lạng Sơn (1988), p.24-25
- Chan, Hok-lam (1990). "The Chien-wen, Yung-lo, Hung-hsi, and Hsüan-te reigns, 1399-1435". The Cambridge History of China (Volume 7): The Ming Dynasty, 1368-1644 (Part 1). Cambridge: Cambridge University Press. p. 230. ISBN 0-521-24332-7.
- Pietrusewsky, Michael; Toomay Douglas, Michele (2002). "Ban Chiang, a prehistoric village site in northeast Thailand: the human skeletal remains". Ban Chiang, a Prehistoric Village Site in Northeast Thailand 1. UPenn Museum of Archaeology. p. 224. ISBN 0-924171-92-8.
- "Vichy Indo-China vs Japan, 1940". Stone & Stone Second World War Books. Retrieved 2010-08-26.
- Colet, John; Joshua Eliot (2002). Vietnam handbook. Footprint Travel Guides. pp. 144–146. ISBN 1-903471-31-1. Retrieved 2010-08-26.
- Ray, Nick; Peter Dragicevich; Regis St. Louis (2007). Vietnam. Lonely Planet. pp. 153–154. ISBN 1-74104-306-9. Retrieved 2010-08-26.
- Mother Jones Magazine. Mother Jones Magazine. November 1983. p. 22. Retrieved 2010-08-26.
- Special issue on Lang Son (1988), p.23
- Discovery Channel (Firm) (2003). Vietnam. Langenscheidt Publishing Group. p. 209. ISBN 981-234-984-7. Retrieved 2010-08-26.
- Special issue on Lang Son (1988), p.13
- Guide to Vietnam. Bradt Travel Guides. 1998. pp. 40, 46. ISBN 1-898323-67-4. Retrieved 2010-08-26.
- Special issue on Lạng Sơn (1988), p.14-15
- "Administrative Unit, Land and Climate: Number of administrative units as of 31 December 2008 by province". General Statistics Office of the Government of Vietnam. Retrieved 2010-06-26.
- "Districts of Vietnam". Statoids. Retrieved June 20, 2010.
- "Population and population density in 2008 by province". General Statistics Office of the Government of Vietnam. Retrieved 2010-06-23.
- "Population and Employment :Average male population by province". Population and Employment :General Statistics Office of the Government of Vietnam. Retrieved 2010-06-23.
- "Average female population by province". General Statistics Office of the Government of Vietnam. Retrieved 2010-06-23.
- "Average urban population by province". Population and Employment :General Statistics Office of the Government of Vietnam. Retrieved 2010-06-23.
- "Average ruralpopulation by province". Population and Employment :General Statistics Office of the Government of Vietnam. Retrieved 2010-06-23.
- "Filed Guide to Vietnam:Limestone Forest: Beyond Stunning Beauty" (pdf). Asia Forest Network. pp. 5, 16. Retrieved 2010-08-26.
- Edmondson, Jerold A., Solnit, David B. (eds). 1997. Comparative Kadai: the Tai branch. Summer Institute of Linguistics and the University of Texas at Arlington Publications in Linguistics 124. Dallas: Summer Institute of Linguistics and the University of Texas at Arlington.
- Special issue on Lang Son (1988), p.16
- "Lang Son". The Free Dictionary by Farlex. Retrieved 2010-08-26.
- Special issue on Lang Son (1988), p.20-21
- "Number of cooperatives in 2008 by kind of activity and by province: Agriculture, Forestry and Fishery". Population and Employment :General Statistics Office of the Government of Vietnam. Retrieved 2010-06-23.
- "Agriculture, Forestry and Fishery: Number of cooperatives by province". Population and Employment :General Statistics Office of the Government of Vietnam. Retrieved 2010-06-23.
- "Agriculture, Forestry and Fishery: Number of farms by province". Population and Employment :General Statistics Office of the Government of Vietnam. Retrieved 2010-06-23.
- "Agriculture, Forestry and Fishery :Output value of agriculture at constant 1994 prices". Population and Employment :General Statistics Office of the Government of Vietnam. Retrieved 2010-06-23.
- Peter, K.V. (2004). Handbook of herbs and spices 2. Woodhead Publishing. ISBN 1-85573-721-3.
||Cao Bằng Province
Bắc Kạn Province
|Thái Nguyên Province|
|Bắc Giang Province||Quảng Ninh Province|