Had a lot of problems with paying Didi with an International credit card. Wells Fargo Visa verified, but flags fraud with every transaction.
Chase won't even verify. Have a Visa and a credit balance in my WeChat, but haven't gotten Didi to use that successfully.

Notice new payment methods in the Didi app. Didi currency and Travel Cards look the most interesting.
Is there a way to get money into Didi currency?

There are three Travel Card types - Premier travel card, Express travel card and Luxe travel card for pre-paid rides. Are these physical cards you can purchase, or are they available online?