My mother was brainwashed by chef Bao Xiao. How can I convince her?

Nine times out of ten products such as lectures are pyramid schemes, and your mother may have been brainwashed. Those who engage in pyramid schemes and sell products by lectures are quite good, and those who specialize in lectures are old. Older people are easily fooled, so don't let your mother participate in such activities. Good products don't need lectures to sell, and people naturally buy them with good reputation. And if the public is using it, it means that the product can't be wrong. If others haven't heard of it, the risk is great.