family travel and alipay etc

So for a few days in China with two teens will one working alipay be enough or does everyone need it. How to use public transport with a group using scans?

I set up alipay (international) already once and my account got banned a few days later even though I did nothing with it then set it up again - with same ph number - and did passport verification, its sticking so far. Is it needed to set up for each family member, or we cant use it to pay for transit?