First of all, iTunes Gift Card distinguishes between different regions, and can only be recharged to Apple IDs in the corresponding regions. For example, the US iTunes Gift Card can only be used to recharge US Apple IDs.
Secondly, Apple does not issue iTunes Gift Card in China, so Apple IDs in China cannot recharge through iTunes Gif Card.
In addition, Apple ID is associated with iCloud (photos & contacts & backup of application data), App Store (application updates), iPhone search and other Apple services. If you change Apple ID or changing the region to which the Apple ID belongs will affect these services.
Clear the above points. If you still want to use iTunes Gift Card to recharge, then:
You must have a non-China Apple ID (transfer to another region or re-register yourself, not recommended) Registered by someone else on your behalf);
You need to purchase an iTunes Gift Card in the corresponding region (available on ), will cause the Apple ID to be blocked);
Use the registered non-China Apple ID to log in to the App Store on the iPhone/iPad/iPod Touch, switch to the App Store in the corresponding region, and there is There is a Redeem option. If you click on it, you will be asked to enter the Apple ID password. Enter the password to confirm and enter the redemption interface. Enter the redemption code scratched off from the back of the iTunes Gift Card into the box, and then click Redeem in the upper right corner to complete the recharge. Or you can choose to use the camera to scan the redemption code on the back of the iTunes Gift Card in the redemption interface.