Skin care teacher is just a name. Most people in the skin care industry do not have a teacher qualification certificate or a trainer certificate, but they have obtained a qualification certificate. For example, I have a makeup artist's license and a beautician's license, both of which refer to obtaining qualifications, which is far from being a teacher.

Therefore, it doesn't matter whether the teacher Jun Jun you mentioned is true or not. As long as she has skin care technology and is recognized by the state, she can give you some advice on skin care.