B9 Payment method Confirm the credit card on file.

B9支付方式确认信用卡。

youdao

For the second case, you can use B9, and not need to make any switches.

对于第二组数据，你可以使用B9，并且不需要切换。

youdao

For the second case, you can use B9, and not need to make any switches.

对于第二组数据，你可以使用B9，并且不需要切换。

youdao