This app uses huge amount of coupons, discounts to attract users. Unfortunately many Chinese citizen don't care if their privacy is infringed, all they care is that they are able to save maybe 5 yuan. Baidu's CEO even made an open statement that Chinese users are willing to trade privacy for convenience. That is a very sad situation.
Oh well, the fact that e-cigarette pneumonia at the end of 2019 and the samples were not allowed to be inspected, and that those US military members who went to Wuhan to participate in an event showed symptoms, is conveniently forgotten.