Wanti Gymnasium is Shanghai Gymnasium, which is about 8 kilometers away from Xujiahui. If you don't know the way, I suggest 20 yuan take a taxi around. There are many buses running in Nantong, Shanghai every 20 minutes. Just at the bus terminal (you can take the subway 1 line from Xujiahui to Shanghai Railway Station and walk 10 minutes to the bus terminal. If you don't know the way, you can look at the road sign. I don't know the situation in Nantong.