How to re-download an app in US itunes store which i already purchased in china itunes store?

Question

Apps in itunes library disappeared today after i transfered my acount to region from China.
How to redownload these apps?(Of course, I am asking for a method that do not need to transfer my account back to China, pay for them again or sugest the White House to occupy China)

Answer 1

"Although you can browse the iTunes Store in any country without being signed in, you can only purchase content from the iTunes Store for your own country. This is enforced via the billing address associated with your credit card or other payment method that you use with the iTunes Store, rather than your actual geographic location. You can use the iTunes Store in all countries of which you’re a resident, but you’ll either need a separate iTunes Store account for each one, or you’ll need to continually be switching the billing information on your single account. Generally, it’s simpler just to set up an alternative account for these situations, although it’s worth nothing that features like iTunes in the CLoud and iTunes Match are designed to work best when using a single iTunes Store account, as you can only switch accounts with these services every 90 days."
From here >  The Complete Guide to Using the iTunes Store | iLounge Article