Can I apply for a visa anywhere?

If you have a passport, what are you going to do? It's not always where your account is! ! The visa was issued in your own country before going abroad, and it is an entry permit given to you by the state. If you go to Britain and want to go to the United States, as far as tourism is concerned, you must go back to China to apply for an American visa. The two countries have different requirements for visas. If it is a business or academic exchange, you can apply from Britain, but you must go back to China to sign it.

However, some international organizations provide convenience, such as the European Union. German visa can visit Germany 16 countries, and you don't need to sign other countries!