Nine Tripod Cauldrons
According to legend the Nine Tripod Cauldrons (Chinese: 九鼎; pinyin: Jĭu Dĭng) were created following the foundation of the Xia Dynasty (c. 2200 BCE) by Yu the Great, using tribute metal presented by the governors of the Nine Provinces of ancient China.
At the time of the Shang Dynasty (1600-1046 BCE) tripod cauldrons came to symbolize the power and authority of the ruling dynasty with strict regulations imposed as to their use. Members of the gentry scholarly shì (士) class were permitted to use one or three cauldrons, zhū hóu (诸侯/諸侯), the rulers of vassal states seven, dàifu (大夫) or ministers of state five whilst only the Son of Heaven (天子), the sovereign, was entitled to use nine. The use of the nine tripod cauldrons to offer ritual sacrifices to the ancestors from heaven and earth was a major ceremonial occasion so that by natural progression the ding came to symbolize national political power and later to be regarded as a National Treasure. Sources state that two years after the fall of the Zhou Dynasty at the hands of what would become the Qin Dynasty the nine tripod cauldrons were taken from the Zhou royal palace and moved westward to the Qin capital at Xianyang. However, by the time Qin Shi Huang had eliminated the other six Warring States to become the first emperor of China in 221 BCE, the whereabouts of the nine tripod cauldrons were unknown. Sima Qian records in his Records of the Grand Historian that they were lost in the Si River (泗水) near Pencheng (彭城) to where Qin Shi Huang later dispatched a thousand men to search for the cauldrons but to no avail.
The Records of the Grand Historian recount that once Yu the Great had finished taming the floods that once engulfed the land, he divided the territory into the Nine Provinces and collected bronze in tribute from each one. Thereafter he cast the metal into nine large tripod cauldrons. Legend says that each ding weighed around 30,000 catties equivalent to 7.5 tons. However, the Zuo Zhuan or Commentary of Zuo， states that the nine tripod cauldrons were cast by Yu the Great's son, Qi of Xia, the second Xia Emperor, and it was he who received the tributes of bronze from the Nine Provinces.
Vicissitudes of the cauldrons 
After Tang of Shang overthrew Jie of Xia, the nine tripod cauldrons were moved to the Shang capital at Yan (奄). Later, when the Shang king Pan Geng moved his capital to Yin (殷), the cauldrons again went with him. Following the overthrow of the Shang Dynasty by the Zhou Dynasty, the new King Wu of Zhou put the nine tripod cauldrons on public display for the first time.
When King Cheng of Zhou ascended the throne, the Duke of Zhou built the eastern capital of Luoyi (later Luoyang), he moved the cauldrons there, at the same time asking King Cheng to carry out their ritual installation in the settlement's Ancestral Hall. (太廟)
The power of the Zhou royal family began to decline at the start of the Eastern Zhou Period (771 BCE) with each vassal state clamoring for kingship. At the time of King Ding of Zhou (r. 605-506 BCE), Duke Zhuang of Chu inquired for the first time regarding the "weight of the cauldrons" (問鼎之輕重) only to be rebuffed by the Zhou minister Wangsun Man (王孫滿). Asking such a question was at that time a direct challenge to the power of the reigning dynasty. King Ling of Chu (r. 540 - 529 BCE) later again inquired of the cauldrons but was unsuccessful due to unrest sweeping the country During the reign of King Huiwen of Qin (r.338 - 311 BCE), the strategist Zhang Yi formulated a plan by which he hoped to seize the Nine Tripod Cauldrons and thus gain command of the other Zhou vassal states. King Qingxiang of Chu (楚頃襄王), along with the king of the State of Qi also sought possession of the treasures as did the states of Wei and Han. The last Eastern Zhou monarch King Nan of Zhou (314-256 BCE) dealt with all these rival claimants by playing them off against other and thus kept possession of the cauldrons.
Loss and recasting 
After the overthrow of Zhou and the foundation of the new Qin Dynasty, the Nine Tripod Cauldrons disappeared. Theories as to their fate abound with no clear agreement amongst scholars. Amongst these theories are claims that the cauldrons were:
- lost in the Si River (泗水) near Pencheng (彭城) by King Zhaoxiang of Qin (r. 306-250 BCE) en route to the Qin Capital
- stolen by Quanrong nomads following the fall of Haojing in 771 BCE;
- melted down and recast into coins or weapons in the final years of the Zhou Dynasty.
Cultural influence 
In all Chinese speaking societies, if someone commented on someone's words as having the weight of nine tripod cauldrons (一言九鼎), this was a great compliment to the person. It meant that the person was very trustworthy and would never break their promises.
See also 
This article is partly based on a translation of 九鼎 九鼎 in the Chinese Wikipedia
- Gongyang Zhuan's Commentary on the Spring and Autumn Annals - 天子九鼎，诸侯七卿大夫五，元士三/天子九鼎，諸侯七，卿大夫五，元士三。
- Strategies of the Warring States, Scroll 1 - Eastern Zhou The Qin State Dispatched Troops to the Borders of Zhou to Demand the Nine Tripod Cauldrons (秦兴师临周求九鼎/秦興師臨周求九鼎).
- Records of the Grand Historian - Scroll 28
- Lunheng - Scroll 26
- Records of the Grand Historian - Scroll 28 "黃帝作寶鼎三，象天地人。禹收九牧之金，鑄九鼎"
- Zuo Zhuan, Third year of Duke Xuan
- Records of the Grand Historian Chu Family Records (楚世家)
- Records of the Grand Historian Scroll 4, Zhou Biography
- According to an annotation to the text of Mozi by his disciple Geng Zhuzi (耕柱子), After the Xia Dynasty lost the cauldrons, the Yin (Shang) Dynasty received them, when they lost them, the Zhou Dynasty received them "墨子•耕注：夏后氏失之，殷人受之；殷人失之，周人受之。夏后、殷、周之相受也."
- Records of the Grand Historian - Chu Family Records
- Strategies of the Warring States - Scroll 3
- Lunheng - Scroll 13
- Comprehensive Mirror to Aid in Government – Scroll 206
- Book of Song – Scroll 66
- (in Japanese) Treasures of the Zhou Royal Family on Display in Beijing