Why China is a genuine no
Unlike Japan or South Korea, China doesn't have a working-holiday-style or spouse-visa exception that's commonly used by foreign English teachers without a degree. The Z visa's degree requirement is enforced by China's national immigration framework, and local labour bureaus check it directly against your submitted documents — there's no accredited hours-of-TEFL substitute for a missing degree.
This has gotten stricter, not looser, in recent years, with more provinces cross-checking degree authenticity through verification services before issuing a work permit.
