Is train in China on time ?

Hi,

We are planning to take the train with a 11 min transit at Huihua station, below is our plan but we want to know if it's the connecting time is sufficient ?

G1755 Chengdu 0724 to Huaihua South 1319

G6378 Huaihua South 1330 to Zhangjiajie 1504

If not we may have to take connection G6358 which is at 1538, what can we do for two hours at the station ? can we visit the town or is there things to do in the station ?

Thank you