Travel from Hong Kong to Zhangjiajie, then Fenghuang and back to Hong Kong. Please

Neither direct trains nor flights are available either from HK to Zhangjiajie and Fenghuang to HK. But you could make a transfer at Guangzhou or Shenzhen. From Fenghuang to HK, you need to get to Zhangjiajie first by bus and then to Guangzhou, last to HK.