Inclusion Criteria: * Male or female aged 18 and 65 years inclusive; * Confirmed diagnosis of Wilson disease; * Low copper diet and standardized medication for ≥ 1 year; * Stable Wilson disease for ≥ 1 year; * Able to understand and willing to follow study procedures. Exclusion Criteria: * Significant hepatic inflammation as evidenced by liver function test. * Liver biopsy or liver stiffness measurement show progressive liver fibrosis. * Laboratory tests or clinical symptoms indicate decreased liver reserve function. * Other chronic liver disease (such as hepatitis B). * Any signs of decompensated liver function (such as ascites). * History of liver transplant or plan to receive liver transplant. * Other diseases with clinical significance, such as cardiovascular and cerebrovascular diseases, kidney diseases, respiratory system diseases, neurological diseases, mental illnesses, active infections, etc. * Body Mass Index ≥ 30 kg/m2. * Other conditions that, in the Investigator's opinion, may not be suitable for the subject to be enrolled.