Bayi Building, Administrative building in Haidian District, China

The Bayi Building is a military office complex at No. 7 Fuxing Road in Haidian District, Beijing. Its main building rises 12 floors above ground with two basement levels, and was designed by the Fourth Design Institute of the General Staff Department. The August 1st Square, used for review ceremonies, lies to the south, while 12,600 square metres of green space extend to the north.

Plans for a larger military complex began in the 1980s, when the Central Military Commission's offices at 20 Jingshan Qianjie, known as the "Three Gates", had grown too small. The project, coded "844 Project", was directed by Fu Xuezheng, who retired as its commander in 1988. Construction broke ground on 2 March 1997, the main structure was finished on 30 October 1997, and the building was completed in July 1999 at a total investment of RMB 779 million.

The name Bayi means "August 1", the date of the 1927 Nanchang Uprising, which is commemorated as the founding day of the People's Liberation Army. The building is nicknamed the "Great Hall of the People's Liberation Army" because it hosts military diplomatic ceremonies and important military meetings.

The building is located in an area with good transportation connections and is easy to access. Since it remains an active administrative facility, visitors should note that access to certain areas may be restricted.

The building was planned as the headquarters of the Central Military Commission and the Ministry of Defense, but it became the venue for military diplomacy and top-level meetings, earning the nickname "Great Hall of the People of the PLA". Its project code was "844 Project", and Fu Xuezheng headed the project command after retiring in 1988.