MWX-203

Primary objectives: 1. To evaluate the safety and tolerability of a single dose of MWX203 injection in healthy Chinese subjects. Secondary objectives: 1. To evaluate the pharmacokinetics of a single dose of MWX203 injection in healthy Chinese subjects; 2. To evaluate the immunogenicity of a single dose of MWX203 in healthy Chinese subjects. Exploratory objectives: 1. To evaluate the pharmacodynamics of a single dose of MWX203 injection in healthy Chinese subjects; 2. To evaluate the possible metabolites of MWX203.