Use another Apple ID of a different country and update my previous apps

Question

Previously I lived in China, and had used my China Apple ID to purchase apps.
I am now living in the US, and registered a new Apple ID with US store. (I keep the China ID because I will go back several years later.) I will begin to use my new ID on my Mac, without deleting my previously purchased apps on the China store.
I am wondering if I can still keep updating these old apps? Someone has given a solution of using two or more Apple ID: when updating apps purchased in another ID, a notification will pop up and ask to type in previous ID and password; this would be fine for me. The problem is that my Mac will have apps in stores of different countries, so I am not sure if this will work.
Thanks!

Answer 1

Strictly speaking you are not supposed to do it that way.  When you change countries it is intended you change the country association of your single Apple account.  This avoids complexities with syncing devices with content from multiple accounts.  You may also find you cannot log onto your account in China to do the updates, and are not supposed to in any case.  This is from the Terms of Service (from the US TOS but likely same everywhere):
E.g., "The iTunes Service is available to you only in the United States, its territories, and possessions. You agree not to use or attempt to use the iTunes Service from outside these locations. Apple may use technologies to verify your compliance." - http://www.apple.com/legal/itunes/us/terms.html#SERVICE
When moving countries the best thing to do is make backups of all content from the other country so you have it when you move and change account country.
Change the country of your iTunes Store, App Store, iBooks Store, and Mac App Store account - http://support.apple.com/kb/ht6119 - "After you change the country of your account, you won't see the items you purchased from the previous country’s store in the Purchased section."