For the diagnosis of Parkinson's disease, the patient's medical history and symptoms are very important, and physical examinations are also an important reference for diagnosis. The physical examination generally involves checking the patient's muscle tone and looking for signs of bradykinesia. In terms of auxiliary examinations, on one hand, it is necessary to perform ceruloplasmin tests, which primarily aim to exclude hepatolenticular degeneration. Brain MRI scans are also conducted to exclude other causes of secondary Parkinson’s disease, such as normal pressure hydrocephalus and cerebrovascular diseases. Additionally, these patients need to undergo olfactory tests and some PET-CT scans to clarify the diagnosis.