Do you want to drive the cheapest car? Take Jiaxing around the toll station to Shengze North-South Expressway to Suzhou and then take S339 to Taicang. There is no toll. Basically no detours.

If you take a bus from Jiaxing to Suzhou North, change buses to Taicang.

Jiaxing, you, me and his team will answer your questions. If you are satisfied, please adopt it in time.