Design and manufacture artificial composite materials based on life system operation modes and biological material structure rules. Our team carries out research in multi-scale fine structures and mechanical properties of natural organic-inorganic composites, such as hydroxyapatite, nacre, urchin tooth, chiton tooth, etc., which provide inspiration for the design and manufacture of artificial composite materials. Titanium and titanium alloy, stainless steel and other metal materials have been studied to improve biocompatibility by surface modification and develop the corresponding new implants for Department of orthopedics and dental implant.