I Became a Best Friend of the System

After the online article author Lin Jingyu became a signing master, he went out for dinner with his best friend Zhou Yu, and they were caught in a thunderstorm! As a result, he and his best friend were both struck by lightning. After an unknown amount of time, Lin Jingyu discovered that he had become the system of his best friend Zhou Yu! And Zhou Yu actually became... (Newbies should be gentle when writing books. If you don't like it, just leave it in the upper left corner. I just want to try out the feeling of writing a novel.)