ALB and neoplasm: This proposed study investigates a more comprehensive approach to the management of GC-CY1 patients on preoperative conversion therapy, in which it is hypothesized that NIPS albumin paclitaxel may provide local management of occult peritoneal metastases or FCCs, and that systemic intravenous administration of albumin paclitaxel as well as carrelixumab and S-1 may induce tumor shrinkage.