It is not good to cling to it. In fact, everyone's lip condition is different. You have to discover how difficult it is to play the best timbre. I don't think it's a good idea to stick to it-the damper should be oval. If it is too tight, it will cause the air door to flatten and form cracks, and the exhaled air will not concentrate and disperse. Not only the timbre is not good, but also the air leakage is serious. You are very tired. . . . . When the lips are naturally closed, gently stick the blowing part of the flute in the middle of the lower lip. Please note that the blowing edge occupies about one third of the lower lip. When the lips are naturally closed, gently pronounce the word "P", then the damper becomes oval, and then slowly blow the sound. Find this feeling and change the word P to the word T "spit" on the basis of this action. The timbre should be full, silent, transparent and ethereal. . . . . This is my view of your intimacy. Some people can find their feelings in an instant, so they don't need to play music, just use "spit". . . . . . My views are for reference only. Please forgive me for any mistakes. May your flute sound better and better!