Jiandi Dao

Jiandi Dao was a prefecture of ancient China located around today's Songpan region, in the east of Qingzang Plateau and northwest part of Sichuan province.
Jiandi Dao was founded by Qin after it conquered Shu in 316 BC. The Han dynasty reestablished Jiandi Dao in the sixth year of Yuanding. Jiandi Dao was changed to Jiandi County and became a constitute part of Wenshan Jun in the Jin dynasty.
Di is an ancient large ethnic group lived in west China which is sometimes considered to be part of Qiang, called Diqiang. Dao in the Qin and Han dynasties is a kind of administrative unit which were mainly settled by primitive tribes.