My Resources Can Be Synthesized in Desert Island Survival

Zhang Tianyuan woke up and found himself on a desert island. What should he do if there was not enough food, water, and resources? While other survivors were still worrying about a bottle of water, he had already begun to build a complete production chain. Stone*1+Stone*1=Solid stone slab. Wood*1+Stone*1=A simple mallet. A bottle of water*1+a bottle of water*1=? ? ? Zhang Tianyuan, who can synthesize resources, immediately became the brightest cub among the many desert island survivors... Zhang Tianyuan: What should we do? My resources can be synthesized in Desert Island Survival