I understand the security concept of it. Luckily my trip was short. As I also use wechat to communicate with some Chinese friends, my experience was different. First it send me an OTP on the new phone, then asked for two friends to send a number to the phone. Luckily I had the phone number of one and I managed to restore and to be honest having humans in the pipeline was a plus. Negative this had to be done over 5 minutes otherwise you back to square one.
