Or in any other country for that matter?
TEFL says there are a few countries such as China where you don't need a degree to work as a teacher. However, you do need to have a degree in order to get a work Visa for China in the first place.
When I look for jobs in China there are plenty which don't require a degree. But how do I even get into the country to work to begin with if I don't have one?
The first question they ask you after your name on the application form is where you got your degree.