How to synthesize the Zhou badge of Adventure Island?

Adventure Island Week badge is synthesized. Players need to collect 7 different kinds of park badges, which can be obtained by fighting monsters in the monster park. You can get a box every day, and the probability of getting the corresponding badge every week from the box is very low. When players collect these seven badges, they can synthesize them and finally get the week badge. Therefore, the process of synthesizing week badges requires patience and luck, because it needs to be cracked and opened continuously until all badges are collected.