San Qin Hall built in Yuan Dynast is the main hall in Yong-Le Temple. it's a single-eave and four ridges building, the width has seven bays and the depth has four bays. In this building several columns was deleted under permission, and for Ang in Tou-Kung, all of them don't really support roof, just preserved as a member of Tou-Kung .  Except of end bays, all of other bays have two cluster corbel-bracket sets between two columns.