Traveling from Hangzhou to Shanghai, want to stop in Xitang, but we have luggage

Hello,

We will be traveling from HZ to Shanghai and would like to stop in Xitang for a few hours. We will have our luggage with us. Is there a place to store our bags? Also what is the best way to do a trip like this? Bus to Jiashan from Hangzhou, local bus to Xitang, then local bus back to Jiashan, and bus from Jiashan to Shanghai?

Thanks!