Haidilao Hotpot (Baizhifang Branch)
Floor 2 1-2, China Construction Second Bureau Building, No.42 Guang 'anmen South Street, Xuanwu District (east of Baizhifang Bridge)
And it's not far from Xidan store.
Haidilao Hotpot (Xidan Branch)
7th Floor, Wedding Building, Xidan North Street 109, Xicheng District