CHONGQING, March 29 (Xinhua) -- Southwest China's Chongqing city will build a museum featuring history and objects related to weapon production during the country's war against Japanese troops from 1931 to 1945.

The facility, with a planned exhibition area of 12,000 square meters, will be constructed based on the ruins of a wartime ordnance manufacturing site encompassing 25 production units in today's Jiulongpo District.

Over 40,000 exhibits, to be held in eight halls, will debut when the museum opens during National Day holiday in October.

Chongqing used to be a major production base for all kinds of weapons, including cannons, grenades and guns, during the 14-year Chinese People's War of Resistance Against Japanese Aggression starting in 1931.