Study on the Health Promotion Effect of External Treatment of Traditional Chinese Medicine in Rehabilitation of Occupational Chronic Metal Poisoning Peripheral Neuropathy-A Randomized, Controlled, Multicenter Clinical Trial

INTERVENTION: Traditional chelating agent group:Traditional chelating agents: Conventional chelating regimens based on the type of heavy metal, including CaNa2EDTA/Na‐DMPS, with each treatment course lasting 1 week (including medication and interval periods), totaling 2 weeks.;Traditional Chinese External Therapy and Traditional Chelating Agents Group:One of the following: Warm Channel Foot Bath Formula / Qi‐Invigorating and Blood‐Activating Decoction. plus One of the following: Microneedle Acupuncture / Press Needles or Acupoint Application / Acupoint Injection. Administered once daily, concurrently with a 2‐week course of traditional chelation therapy (using CaNa?EDTA/Na‐DMPS). One week constitutes a full course (including both medication and interval periods), for a total of 2 weeks.; CONDITION: Chronic metal poisoning peripheral neuropathy PRIMARY OUTCOME: Peripheral Neuropathy Subjective Symptom ;General systemic symptoms and signs; SECONDARY OUTCOME: Neuroelectrophysiological examination;Traditional Chinese Medicine Syndrome Scoring ;Quality of Life and Overall Assessment ; INCLUSION CRITERIA: 1. Age: 18‐60 years old, occupational exposure workers. 2. Patients with peripheral neuropathy caused by heavy metal poisoning who meet the diagnostic criteria for "Occupational Chronic Metal Toxic Peripheral Neuropathy" as stipulated by national standards and are classified as having "Qi deficiency with blood stasis and collaterals obstruction" syndrome according to Traditional Chinese Medicine (TCM) syndrome differentiation. 3. Signing the informed consent form: Voluntary participation and signing of the ethical review documents.