Yoga practice, if more basic, can buy books at home, but without a coach to correct your wrong posture, you are more likely to get hurt. Zhang Huilan, the mother of yoga in China, has produced many CDs and books, which are also very professional. The Light of Yoga is good. It was written by one of the founders of Kazakhstan. And it seems that if you buy it online, 30 yuan is not very expensive, which is more professional. I am a yoga instructor, and almost many yoga instructors have this book. It has not only asana and asana exercises, but also specific actions to relieve symptoms. However, I suggest you go to the guild hall to study, even if it's just a few classes to explore the tricks. Hehe, this is my personal opinion, you can refer to it.