No railway station is available in Zhangjiagang. From Pudong airport, you could take the bus directly, which departs at 12:50, 14:40, 15:40, and 17:40 respectively. Or, you can take the airport shuttle line 5 to the long-distance bus station nearby the train station. And there are many buses to Zhangjiagang from 06:00 to19:00 daily.