I will be driving from London to Mongolia this Summer. Once in Ulaan Baatar, I may want to get a visa to fly to China for a few days before flying back to Europe. I will be traveling on a British passport, but it may be full by then with visa stamps from so many countries. I will also have an American passport with me that has many blank pages.

Do you think it would be possible to get a Chinese visa at the Chinese embassy in Mongolia? If so, will it take long? Expensive?

Cheers,
Nick