RecruitingDietary supplementClinical Study of Taurine Combined With Neoadjuvant Chemo-Immunotherapy for Treatment of Locally Advanced Gastric CancerThis project aims to evaluate the efficacy and safety of oral taurine supplementation combined with PD-1 inhibitor (serplulimab) and chemotherapy in inducing systemic CD8+ T cell responses and achieving improved gastric cancer patient outcomes than with serplulimab and chemotherapy alone.