I want to add to Ever's first paragraph.

If you have bachelor degree , in something else ,for example. And you come to China doing a kindergarten job ("crappy training centre" or kindergarten otherwise) - but at the same time doing an online Post-grad course in TESL/TEFL - i'm sure there is many here that would say that is a good strategy. Because you're learning to teach, learning the concepts AND applying them in your teaching. Regardless that it's kindergarten as later down the track when you have that cert you'll qualify for teaching middleschool + higher and you can show to them you had teaching experience.