First, if you get off at the Central Station, that is, the North Square of Wuxi Railway Station, you can choose to take bus 133 and get off at Jiangda South Gate (Wuxi Henghua Science and Technology Park) station, which can go directly to Jiangnan University, but you need to get off and walk to the east gate. The advantage is that you don't need to change cars, which is convenient for you to find your way; If your time is not very tight, I suggest you choose this method. If you want to walk less, get off at Jiangda Nanmen Station, and then transfer to 105 or Express 1 at the station across the street. Take one stop and get off at Jiangda Dongmen Station.
Secondly, if you get off at the South Square of Wuxi Railway Station, I suggest you cross Xingyuan Road to the station near the opposite China Travel Hotel, take bus No.77, and then get off at Jiangnan University (Wuxi Vocational College) station, which is near the north gate of Jiangda. After getting off the bus, you will see a big archway. Just go in.
This bus No.77 is also suitable for you to get off at the central station, but the bus No.77 and 133 are not necessarily at the same waiting place at the central station.
If there are still unclear or other questions, you can write to me in the station.