In order to improve the disease-selectivitysafety of antibody drugs, we use the autologous hinge as an antibody lockuse protease substrate peptide as linker to generate pro-antibody. Only in the disease area, the overexpressed protease will restore the function of the antibody. The antibody lock can improve the safety of antibodiesthe quality of patient medications. This technology has global patents (granted in 15 countries)technology transfer experience. We believed that the universal antibody lock will bring a revolutionary breakthrough in antibody drugs.