Secondly, the practice of posture method includes stretching, twisting, strength, balance, coordination, handstand and other different forms and contents. Stretching-flexibility is just one of them, so don't think that practicing yoga is pulling ligaments, and don't think that people with good flexibility are yoga masters. Don't spend all your time and energy on flexibility.
It is also very important that classes in yoga clubs, such as Heart Flow Yoga, Strength Yoga, Hatha Yoga, Tandem Yoga, Iyengar Yoga, bikram yoga, etc., are all the same in different styles, but the styles of practice can be completely different. For example, although there are different ways to write calligraphy, such as block letters, official scripts, running scripts and cursive scripts, the Chinese characters are the same.
Another example is Tai Ji Chuan. Although there are schools such as Chen, Yang, Sun and Wu, the basic movements such as "cloud hand" and "single whip" are the same, but some postures are developed, some are compact, some are fast and some are slow.
Posture is a carrier, which enables us to acquire a healthy and complete body and mind. So, just choose your favorite style and keep practicing.
"All laws are metaphorical" and "All laws are equal and uncontroversial". Don't get lost in the practice of posture.