How to provide services successfully to China?

Hello everyone (writing this in English because it appears to be the main language of the subreddit, but I am at an HSK 3 level in Mandarin and continuously studying).

I'm interested in providing services to China. I live in Panama, where there are many Chinese immigrants. I teach English and Spanish, and what I'm observing is that there is an increasing demand to learn Spanish over there and some Chinese that live here have somewhat confirmed that. I want to start providing services to Chinese people in China and immigrants here in Panama, and I wanted to get some general advice about how to provide my services over there. How would payment work? Do I need to have connections to prosper in China or are there ways I can market myself on social media? Any advice would be greatly appreciated!