It means that the credit card has been bound to other Qunar.com accounts. It needs to be unlinked in other accounts before it can be used.
How to unbind credit card from Qunar.com account:
Log in to Qunar mobile client
1. Personal account
2. Personal Wallet
3. Select a credit card
4. Select the card number you want to delete and press and hold the delete button to pop up!
Log in to the Qunar computer website
After logging in, click your username to enter your personal homepage, then click My Account, then click Account Assets, select frequently used cards, which contains all bound cards. , there is a management in the lower right corner of the selected card to be operated, and there is a delete button when you enter it.