Hi! I am planning a trip to China. I am thinking

Beijing - 3 days

Fly to Chengdu - 1 day at the Panda Base

Train to Chongqing - 1.5 - 2 days there

Train to Zhangjiajie - 1.5 - 2 days there

Train to Changsha - 1 day there (really just a stop to get to Shanghai)

Train to Shanghai - 2 days there (1 day Disney, 1 day other)

Total 12 days - Is it too packed? Should I cut something out?