The System Takes Me to Be a Gu Master

The world is unkind, treating all things as stupid dogs. As the saying goes, where there is light, there is darkness. There is something unknown behind everyone's heart. The world is so big and full of wonders. There is a profession in the East that is hated and feared by everyone. This profession is called Gu Master. They use insects as Gu. Not only are they powerful, but the insects they use are even more powerful.