Step 1: open the Taobao app or official website
Step 2: search for keywords such as "Hong Kong Apple Account" or "US Apple Account" (sort by sales if you can't find the relevant results)
Step 3: click to open the relevant offer, select the United States, Hong Kong or other countries and regions, click to buy now and make the payment.
Step 4: you'll automatically receive the non-mainland Apple ID account password sent by the seller at this time
Now, you have a non-mainland Apple ID.