I am familiar with Qidong. I'll give you several plans. The best recommendation is to buy Nantong direct train at Qidong East Station. By the way, can the conductor book a ticket from Zhang Nan to Wuxi? If there is, book it. Qidong to Nantong 1 hour 40 minutes. I said through train. Then get on the bus in Nantong, and then get on the bus to Wuxi.

Second, plan. Qidong West Railway Station buys tickets to Shanghai, and then transfers to the train to Wuxi. Attention, to buy tickets for Shanghai, you have to buy a car at Shanghai Railway Station Square.