CHTT

Results 3 issues of CHTT

In the v0.9.4, the cat api of health has a time zone problem ,the timestamp field is 8 hours short of normal time,how to solve it ![image](https://user-images.githubusercontent.com/55541619/118622354-cf719800-b7f9-11eb-977e-d9e16c4fa86d.png)

请问保存成pkl文件的数据集是怎么处理的?

can we have yelp data set? thank you for it.