My System Is Salted Fish

[The full text is complete and all chapters have been revised. Li Yao, who lost his memory, was suddenly forced to start a random time travel. Becoming Long Aotian's servant, the cannon fodder under the male protagonist's feet, and a supporting role for the Hengdian crew... He crawled around in the world with a useless salted fish system. The protagonist of each world is a person named "Yang Ming", and Li Yao's task is to help him achieve the protagonist's achievements and then kill him. Maybe there is a system for every kind of master. Li Yao, who participated in the protagonist's growth process, still couldn't bring himself to kill Yang Ming. Although every time he came to a new world, Yang Ming would forget what happened in the previous world and treat him as an unrelated stranger again. But even so, it didn't matter. Li Yao still didn't want to hurt Yang Ming. Even if he couldn't complete the task, he wouldn't be able to return to the original world and reunite with his brother. No, his original world...? How did he travel through time in the first place? Himself... Who is he? Purpose: Reveal the law of entropy increase in the universe