In continuous subscription realms, you can only use visa or MasterCard credit card for continuous subscription. You cannot subscribe using the payment method associated with a Microsoft account. For example, in China, people use UnionPay bank card and Alipay, and do not use visa or Mastercard. And as you know, minors can't apply for credit cards. This causes a lot of problems for us.
Hi Yucheng, I am sorry our payment offerings are not satisfactory to your needs. We are currently reviewing our checkout system and looking at suppliers. While Alipay is one of our options we are offering for new purchases, it seems unfortunately that our payment provider does not support them in combination with recurring payments. I hope you find a workaround method for the time being!