1. Setting of doll catching machine: The setting of doll catching machine will affect the difficulty of catching dolls. If the doll machine is set loosely, it is relatively difficult to catch dolls, and vice versa.
2. Skills of catching dolls: Mastering the skills of catching dolls skillfully, such as observing the grasping force of the machine and choosing the appropriate grasping angle and strength, can improve the success rate of catching dolls.
3. Luck factor: Luck also occupies a certain proportion in the process of catching dolls. Sometimes, even if you master the skills, you need some luck to catch the doll successfully.