RecruitingBiological interventionThis Clinical Trial is Designed to Evaluate the Safety, Tolerability, Feasibility and Preliminary Efficacy of NouvNeu001 (Human Dopaminergic Progenitor Cells Injection) in Patients With Parkinson's Disease.This is a phase 1/2 clinical study to evaluate the safety, tolerability, feasibility, and preliminary efficacy of NouvNeu001 in patients with advanced Parkinson's Disease.