No. You cannot teach English in China legally, without a degree that has been certified by the government.
Although in reality improper visas and illegal work do exist, the government punishes such actions more strictly years by years.
While China, and most every country, has had people working on improper visas for decades, there have been recent crackdowns, as police in major cities like Beijing are concerned about national security before political events, and now China is concerned about Coronavirus risk from outsiders.
scams about teaching in China
Here I will talk about some scams about teaching in China
1. If your employer is very eager to hire you and offer you a high-paid salary, even if you lack a bachelor's degree, teaching experience, TEFL certificate, teaching qualifications, etc.
2. If the school is ready to hire you without a work visa.
3. If your recruiters promise you an international school position but start you with another position.