The patented needleless engraving instrument used in needleless engraving introduces silk fibroin thread into the subcutaneous layer point by point, without any pain, skin breakage and redness, so that customers can witness how silk fibroin thread enters the subcutaneous layer. The operation of the instrument is extremely simple and effective. Pure natural silk fibroin thread has passed the strict inspection of the country. There is no recovery period after surgery, and you can wash your face and make up on the spot after you finish it, which has no effect on normal social life.