The Uber app that's used by people around the world is being disabled in China. Travelers who want to try to book a ride through Uber there will have to download a separate Uber China app that's only available in Mandarin and doesn't accept foreign credit cards, CNN reports.

The changes are currently being rolled out across China. They are the work of Didi, the ride-hailing company that dominates the Chinese market and is taking over Uber's China operations in a multibillion-dollar deal.

The overhaul breaks Uber's pledge its global customers that "if a city you visit has Uber, you can request rides there just like you would back home."

"We apologize for the inconvenience temporarily caused to our global roaming users," a Didi spokeswoman said, describing the changes as the first phase of a transition plan for Uber China.