Living in the Doomsday, I Can Synthesize All Items Infinitely

Water sources are polluted, all plants and organisms mutate, and the increasingly solidified classes completely collapse. Civilized plundering methods are no longer applicable, and humans return to the laws of the forest. Zhang Fan dug out two schoolbags. [Identification Item: Ordinary School Bag] [Can I synthesize it? Start synthesis [Excellent school bag] - [High toughness school bag] - [One cubic meter space bag] - [Idea space bag] He was stunned for a moment and decided to live in peace from now on. The road to brainless synthesis has begun.