Bullshit. If you can price jade, it is not rich to go directly to business. The value of jade in everyone's hands is different, depending on personal sales channels and other factors.

What they teach is nothing more than introducing the truth and falsehood of jade and knowing its quality. And some other knowledge. But these are also prerequisites for entering the market.

In practical application, value identification can't be learned.

If a teacher is proficient, what else can he teach? He can run his own business. Earn your tuition.

Shifosi people drift by