Cheater trick one: charge first when you study, and you are nothing in the hands of others.

Cheater trick 2: after you go, I want you to buy cigarettes for the master or something. Needless to say, I'm sure you have been cheated.

Trick 3: After teaching, I want you to buy a medicine bag from him. He sold you a bag of 20-30 yuan and made himself a bag of 5 yuan.

Trick 4: Use some unsound and outdated technology to teach, which contains a lot of toxic substances. Think about opening your own shop and not trusting yourself how to sell it to others! !

If you want to be a duck neck, please make a field trip to prevent being fooled.