If you're taking a trip to China or Southeast Asia, Lyft could be a valuable addition to your arsenal of travel apps. Starting this week, it will be able to access rides you can hail through its partners Didi if you're in China and Grab if you're in SE Asia. You won't have to download a separate app or set up a new account, and you can even pay in dollars with the credit card you already have on file. It also works the other way around: folks from those regions can simply fire up Lyft whenever they visit the US and pay in their own currency.