The expressway is approximately 1,900 km (1,200 mi) in length; about 730 km (450 mi) is in Yunnan and about 250 km (160 mi) is in Laos. It is jointly funded by China, Laos, Thailand and the Asian Development Bank. It stretches south from Kunming to Xiaomenyang (16 km or 9.9 mi from Jinghong) and crosses the Lao border at Mohan. It traverses through jungle and highlands in southern Yunnan and Laos before entering Thailand at Chiang Khong. It continues southward, mostly as Thailand Highway 1 (named Phahonyothin Road), until it reaches Bangkok.