Huaxi Bio-Runzhi doll needle. Runzhi doll needle is a class III medical device product approved by NMPA under Huaxi Bio, and its clinical application is more compliant and safe. Runzhi doll needle contains cross-linked hyaluronic acid, and the hyaluronic acid is slightly cross-linked to form a long-acting water-light needle, which not only can better replenish water and lock water, but also has the functions of firming plain lines and lasting rejuvenation. Sili 715 is a product from Revitacare Laboratory in France, a subsidiary of Huaxi Bio-technology. It contains active ingredients such as nucleic acid, coenzyme, antioxidant and trace elements to adapt to dark skin, skin saccharification and collagen loss, and is not aimed at hydrating. Therefore, Huaxi Bio-technology makes doll needles more hydrating, while Sili 715 is more effective.