Chongsaikang, Protected cultural site in Lhasa, China

Chongsaikang, also called Tromzikhang, is a three-storey Tibetan-style courtyard building on the north side of Barkhor Tromshung Jang, northwest of the Jokhang in Lhasa. Its surviving symmetrical facade runs 63 metres along the square, and a red Pembe stripe at roof level marks a residence built for an incarnate lama. The interior was demolished in 1997–1998; the facade now fronts a housing complex and market.

Built around 1700 under the 6th Dalai Lama on the sunny north side of Barkhor Tromshung Jang, Tromzikhang became the first Qing ambans' residence and office in Lhasa in 1728. In 1750 the ambans Fuqing and Labudun were killed there during the rebellion of Gyurme Namgyal, and the building was burned. A shrine to the two men, the Shuangzhong Ci, was later erected on the site; after 1911 it served as Tibetan government offices, and the interior was demolished in 1997–1998, leaving the 63-metre facade.

The Tibetan name Tromzikhang means "street-watching house" or "market." The red Pembe stripe at roof level marks a residence built for an incarnated lama, linked to the 6th Dalai Lama. Between 1938 and 1949 the building housed a Republican School with Chinese, Hui and Tibetan teachers, attended by Gyalo Dondrup, eldest brother of the 14th Dalai Lama.

The exhibition hall opened on 1 July 2013 after the 2012 restoration of the old Tromzikhang building. It stands on the north side of Barkhor Tromshung Jang, northwest of the Jokhang, near Tromzikhang bus station and the Jamkhang. The surviving 63-metre three-storey facade faces the square; the entrance corridor holds the 双忠祠 stele on the right.

The gateway corridor once held three stone tablets inscribed in Chinese and Manchu, said to record the 1750 rebellion of Gyurme Namgyal, the regent killed that year. The red Pembe stripe at roof level marks a building meant for an incarnate lama, and the 63-metre facade survived the 1997–98 demolition of the interior.