Tan Trao is a small valley lying between mountains and jungles in Son Duong district, Tuyen Quang province, 200km from Hanoi.

Tan Trao is a historical area that was used as a resistance base before the August 1945 Revolution. Tan Trao was a temporary capital of the independent section of the country, where the Vietnamese Communist Party held several meetings, especially during August 1945. On the 13th, attendees voted in favor of a general revolution during a National Conference meeting of the Communist Party. On the 16th, the National Assembly Conference was held. Ten major policies were voted by the Vietminh, the League for the Independence of Vietnam, and a temporary government chaired by President Ho Chi Minh was established. The Vietminh army was also founded on that day. Also on the 16th, the Temple Government led by President Ho Chi Minh had a meeting in the Tan Trao Communal House. The participants of this conference stayed at the Hong Thai Communal House. One hundred meters north of the communal house is the Tan Trao Banyan tree.