There is no direct flight to Wujiang, but Wujiang is a subordinate county of Suzhou, so you only need to go to Suzhou, and all major bus stations in Suzhou have 10 minutes of running water to Wujiang.
This is the bus from Heze to Suzhou. The departure time of Heze Bus Station is 12: 20, and the fare of car telephones 0530-562 3403 and 562 3343 is 128.