Apple CEO Tim Cook speaks at an Apple event at their headquarters in Cupertino, California, U.S. September 10, 2019.
A crackdown could cost Apple as China appears to get more serious about moving away from Western technology.
  • Apple's list of challenges in China appears to be growing.
  • The country is tightening restrictions on the app store that would eliminate a popular loophole.
  • China accounted for billions in revenue for Apple last year.

China could soon crack down on a major loophole in its "Great Firewall" that allows its citizens using Apple's App Store to access some otherwise forbidden apps.