You can take the bullet train to Shanghai Hongqiao first.

When you arrive at Shanghai Hongqiao, take the high-speed train to Jiashan South Station, and then take k222 bus to the entrance of Xitang Scenic Area.

There is a direct bus to Wuzhen at Xitang Bus Terminal, which takes about an hour.

If you live in Xitang Scenic Area, you can recommend Xiaohe Time Inn, which is cost-effective.