Electroacupuncture Combined With Paclitaxel Protein-bound and PD-1 Antibody for Second-line Treatment of HER2 Negative, pMMR/MSS Advanced Gastric Cancer

Inclusion Criteria: Patients must meet the following study enrollment criteria: Age ≥18 years old and ≤75 years old; Pathology and imaging confirmed advanced gastric cancer with HER2 negative and pMMR/MSS; Progression after first-line chemotherapy with fluorouracil and platinum-based regimens and ±PD-1 monoclonal antibody treatment, second-line treatment is planned; The ECOG score is 0-2; Life expectancy \> 3 months; Willing and able to accept follow-up until death or the end of the study or the termination of the study; The hematological function is normal (platelets \> 80×10\^9/L; White blood cells \> 3×10\^9/L; Neutrophils \> 1.5×10\^9/L; Serum bilirubin ≤1.5 times the upper limit of normal value (ULN), transaminase ≤5 times ULN; There was no ascites, the coagulation function was normal, and the albumin was ≥30g/L; The Child-Push classification of liver function is grade A; Serum creatinine is less than the upper limit of the normal value (ULN), or the calculated creatinine clearance rate is \> 50ml/min (using the Cockcroft-Gault formula) ; Exclusion Criteria: Patients meeting any of the following criteria will be excluded from the study: The primary tumor recurred; Severe arterial embolism or ascites; There is a tendency to bleed or coagulation disorder; Hypertensive crisis or hypertensive encephalopathy; Severe and uncontrollable systemic complications such as infections or diabetes; Clinical severe cardiovascular diseases such as cerebrovascular accident (within 6 …