Where is the largest exhibition hall in China?

The largest existing pavilion in China is Kuoru Pavilion (Bafang Pavilion).

Located in Kunming Lake of the Summer Palace in Beijing, Bafang Pavilion is the crown of ancient pavilions in China. Located at the eastern end of the 17-hole bridge, it is the largest existing exhibition hall in China. Covering an area of 130 square meters, it has three circles inside and outside, supported by 24 columns 16 square columns and octagonal double eaves, which is magnificent and plays an important role in gardens. Pavilion, 17-hole bridge and Nanhu Island are connected together, which looks like the head, neck and body of a turtle. It is said that this is a turtle-shaped symbol of longevity.