Not credible. Pelvic floor muscle refers to the muscle group that closes the pelvic floor and connects the pubic bone and the coccyx. Pelvic floor muscle refers to the muscle group that closes the pelvic floor, surrounds the opening of urethra, vagina and rectum, and supports pelvic and abdominal organs. Teacher Liu and WeChat's online therapy is not credible. He is no expert at all. Everyone in a company is called Mr. Liu. Moreover, the product is still useless and will affect health. After being bought, you will be kicked out.