How to do the level 40 artifact of Tianlong Babu?

Find a 40-50 level double perfect weapon and give it to Suzhou Ou Yezi. Weapons cannot be higher than the level of the character. The task is for you to kill 3000 monsters. The height of the monster cannot exceed the 10 level of the character. After killing, ask the task to get a holy festival and four patterns of artifacts for you to choose from. You can choose any pattern you want to make. It can be repaired later with 1 new awn. For level 40 artifacts, only 5 new mang symbols are needed.