How many days in Tianzi Mountain and Yangjiajie

Hello,

I plan use the cable car to visit Yangjiajie Scenic Area first and then take sight-seeing bus to reach Tianzi Mountain. It's possible visit this two places in only one day? I sleep in 張家界土家樹屋客棧 the day before the visit to start the visit early in the morning. Late afternoon I plan sleep in Zhangjiajie Downtown city. What do you think? It's too tight?

Thank tou

Best regards

Ana Costa