Which bus should I take from Zhong Da East Market to Rong Sheng Building, the annual Big Health Building?

You can take the G27 1 bus. The route is as follows:

Walk 140m to Middle East Market Station, get off at G27 1 Road, 13 Station and get off at Shanlu (Qingyifang) Station, and walk 370m to Rong Sheng Building.

The whole journey is about 5.4 kilometers and is expected to take 46 minutes. It passes through eight traffic lights and doesn't need to change.