In the game "Chivalrous Prequel", there are many copies of the prequel, such as "Heat Wave Island". Each copy has a different boss, different weapons and different customs clearance methods. When making a copy, you should choose the appropriate role and weapon according to the characteristics and weaknesses of boss, use terrain and obstacles to avoid mobs' attacks, and keep a distance from mobs to avoid being besieged. When attacking gangsters, we should use weapons reasonably, choose appropriate attack methods and angles, and improve attack efficiency and hit rate.