There are several options when searching for competent candidates of language teaching position. For example, you can check out teaching-focused websites directly like TopTutorJob.com/jobs. Recruiters working for the websites can help you pick the most suitable candidates. They are adept at capturing potential teachers in job markets. Or you can search on your own, but it could be time-consuming.
Well, if you have interest in teaching in china, you need to satisfy the basic requirements for applying a z visa, besides, you also need have suitable ways to match yourself with suitable positions, I think this website can help you a lot:
you can find the information in my profile.
If you have more than three-year related working experience, you will be more competitive among all the candidates when teach in China. Meanwhile, a teaching certificate or qualification issued in the English-speaking countries like U.S, Canada, UK, Australia, or New Zealand would be preferred.