The pure copper made Copper Hall behind the Qianbo Hall is a rarer cultural relic in China. The hall is high, wide and deep. The plane of the hall is square, nine chi wide (1 chi=1/3 meter), eight chi deep and two zhang (1 zhang=10/3 meters). Though with two-story appearance, the hall is actually one story with a room, four pillars and drum-shaped column bases inside. Upper layer of Xiantong Temple is carved with six partition boards and the lower is with eight ones. Ten thousand of golden and spectacular small Buddha statues are carved on the walls of the hall. There are also exquisite and delicate color paintings and patterns of flowers, birds and animals engraved on the columns, architraves and partition boards. The Copper Hall was mentioned in Records of Qingliang Mountain (), which read: the Copper Hall was built by senior monk Miaofeng () of Mount Wutai with of copper in the period of Wanli Emperor (1573-1620) in the Ming dynasty (1368-1644).