Where and which bus line at the Hutai station will take us direct from Shanghai to tongli?

You can take a direct bus to Tongli from Hutai Road Passenger Transport Station. The bus station is located at No. 1015, North Zhongshan Road. It is adjacent to Main Railway Station, so you can easily find it.
You don't need to figure out the bus number. It departs at 13:30, and the trip takes about 2.5 hours. The fare is about CNY 20 per person.