If you want to visit the Wulong Cave in Chongqing, you will need to get up early in the morning, and start at about 08:30. The transfer from Chongqing to Wulong is about 3 hours, and the visiting time is about 2 hours. When you transfer back to Chongqing, it will be around 20:00. You can also stay one night there, but please keep in mind that the condition of hotel and restaurant there are not so good.