How far is it from Tongnan County in Chongqing to Zhongjiang stalagmite in Deyang?

Self-driving is about170.9km.

Take the Chongqing Tunnel Expressway from Tongnan County to Suining, then from Chengnan Expressway to Chengdu, and get off at the G42 Hurong Expressway penny toll station.

Attached drawings for reference: