Hi, is there any prepaid sim card with data plan that i could get at Chengdu or Shuangliu airport.

Near the Entrance 9 of the domestic departure floor, 3F, T3, there is a China Mobile branch office, where you can buy the Sim card. They provide bunches of data plans, and the work staff will help you to choose the most suitable data plan according to your need.

Besides, there are also many branches of China mobile, Chin Unicom and Chian Telecom in town. You can easily find one upon arrival.