Single Dose Clinical Trial of MG-ZG122 in Chinese Healthy Adult Subjects

Main purpose: To determine the safety and tolerability of MG-ZG122 humanized monoclonal antibody injection (MG-ZG122 for short) in Chinese healthy adult subjects. Secondary objective: To study the pharmacokinetic (PK) characteristics of MG-ZG122 in healthy Chinese adult volunteers, and to provide a basis for the design of clinical trial protocols for subsequent clinical trials; To evaluate the immunogenicity of MG-ZG122 in Chinese healthy adult volunteers; Preliminary exploration of the efficacy of MG-ZG122 in Chinese healthy adult subjects Impact of Biomarkers in Physiology (PD).