Chinese apps are becoming more embedded in daily life in China, but many obstacles remain for foreign visitors to use them.

The EU has opened a formal investigation and could impose penalties to “level the playing field,” while China decries that step as “naked protectionism.” European automakers are hoping to avoid the fate of Europe’s solar industry a decade ago, when it was mostly wiped out by low cost Chinese competitors.

Lawmakers are afraid the technologies could be used by the Chinese government for spying.

It's about national security, fraud and rogue employees.