What is good? Saving the common people, helping the weak and helping the poor, giving to the public. What is evil? Fish and meat people, bullying the weak, killing like hemp. Since ancient times, good and evil are like fire and water, and they are incompatible. To control evil with evil, how to distinguish between good and evil? So far, welcome to Hanas College, we advocate using evil to deal with evil, and using evil to restrain evil.