Chunyi Lin's materials are the best. I have tried many forms of qigong over the years, and Spring Forest Qigong is the most effective in dealing with my health problems -- migraine headaches, insomnia and mitral valve prolapse. Apart from acupuncture, SFQ is the only thing that has brought me relief from these conditions, and that includes Western medical science, which has done nothing. Master Lin's message of Love, Forgiveness and Kindness will change your life. He's the best!!