How about Shang He's eyesight maintenance? Have you ever done it?
The Shang He products I made for my son are used for vision maintenance and manual massage by ultrasound. I feel cheated. My son is nearsighted 150 degrees, and she says a course of treatment is 2 1 day. She also said that my son was short-sighted and recovered his vision after several times, but a course of treatment was coming to an end! Now myopia is still above 100 degrees. What should I do?