What's the difference between Taoist Taiji Eight Diagrams Yin-Yang Chain Tactics and Meridian Tactics? When and under what circumstances is it suitable for use? Which tactic is more conducive to silen

What's the difference between Taoist Taiji Eight Diagrams Yin-Yang Chain Tactics and Meridian Tactics? When and under what circumstances is it suitable for use? Which tactic is more conducive to silence? On the thumb and middle finger of the left hand, the one with the long name is pinch, and the meridian must be buckle. The shape of the middle finger and thumb of the former is angular, while the latter is round. The one with the long name is actually a bit rigid, and meridian is definitely more suitable for beginners of meditation (especially those who have not found Qi Qi). The former has a hand tactic, which seems to be a post-fork guide.