The First Order 2

Nuclear winter has arrived, civilization has collapsed, and humanity is no longer the master of the world. Species mutations and scarce resources create an unpredictable future and environment, leading to a series of crises. To protect themselves, humanity has built walls, but outside these walls, survival depends on blood and fire. The protagonist, Ren Xiaosu, and his younger brother, Yan Liuyuan, are among them. They were just ordinary teenagers in the wilderness, without shelter or a way out;...

Adaptation of Huishuohua de Zhouzi's (会说话的肘子) web novel of the same title.