Chongqing has good train cnnections though routes tend to be circuitous because of the mountainous terrain.  There are connections to most major cities and the train station is located across from the long distance bus station.

Chongqing Rail Station 重庆火车站 (Chongqing huo che zhan)
Address: Caiyuanba, Yuzhong District (渝中区菜园坝)
Phone Number: +86 (0)23 6386 2607, 6168 1114
Local bus routes: No. 619