1. First open the settings as shown in the picture.

2. Then click iTunes&App Store, as shown in the picture.

3. Then click appleid, specifically, as shown in the picture.

4. Then when the small window pops up, click "Query (View) Apple ID" (i.e. the first one), as shown in the picture.

5. Then enter the password of the logged in user and the Chinese ID of the user who does not have a logged in account or password, as shown in the figure.

6. Then modify the priority of the address contained in the payment information, as shown in the figure.

7. As shown in the picture, the postal code, phone number and province will not be changed first.

8. Then modify the country and region, as shown in the picture.

9. Then select the United States, as shown in the picture.

10. Then click Agree, as shown in the figure.

11. Then click to agree to the agreement, as shown in the figure.

12. Finally modify the "state (province), city, zip code, phone number", etc., click "Next" in the upper right corner to complete the modification, and then change the AppleID to AmericanID, as shown in the picture.