The business that the landlord said is Alipay's remittance E. As long as you go to the post office and say that you want to handle remittance E, the staff will give you a remittance slip. You only need to fill in the remittance amount, telephone number and sender's name, and the rest can be left blank. I will give you a remittance password after filling it out. After setting it up, I will give you a money order, take it home, log in to Alipay account and choose to recharge, and then choose postal remittance. E. Enter the money order number and the remittance password you set at the beginning, and you can charge the money into Alipay, and then choose to pay the balance when you buy something. In fact, post office remittance is just a way to recharge.

Alipay payment is generally divided into "balance payment"-online banking payment-cartoon payment.

After recharging, the money will be in your Alipay account, so choose the balance to pay.

But I haven't done postal remittance either. Looks like I need an ID card, too. Just ask.