j4: I have found map APPs essential to everyday living, when you are outside home/office.

In contrast, Taxi APP is important but less than 1) subway and 2) bike sharing.

— Baidu map

—  Alibaba’s Amap [高德]
If you don’t log in, then you may experience strange errors “网络不行, 建议下载 offline map”

smrz for passport .. unsupported. TechSupport said that taxi booking without smrz is unlikely, but I was able to book twice

Payment .. binding with alipay done. No bank card binding possible.

tap on your username or icon > 编辑资料 > 个人资料 — you can set DOB and weight. I don’t know how important these things are.

TechSupport .. only by chat 🙁