This study aims to investigate the preventive effects of electroacupuncture on immune-related adverse events (irAEs) in patients with malignant solid tumors at the neoadjuvant stage, locally advanced, unresectable, or metastatic stages, who are receiving immune checkpoint inhibitors (ICIs) monotherapy, ICIs combined with anti-angiogenic agents, or ICIs combined with chemotherapy. The study will evaluate the efficacy, safety and mechanisms of electroacupuncture in preventing irAEs in a multicenter setting.