1. First, you need to unlock the cat's second skill slot. This can be achieved by completing a specific task or cooperating with other players to complete the task. The specific requirements of the task can be viewed in the task list.

2. Once the cat's second skill slot is unlocked, you can choose to equip the second skill. You can see the cat's skill slot in the equipment interface, including one skill and two skills. Select the skill you want and equip it in the second skill slot.

3. Choose the skills that suit your cat. Different skills can provide different effects, such as increasing attack power, improving defense ability or increasing recovery effect. According to your own game style and needs, choose the skills that suit your cat.

Once you are equipped with the second skill, your cat will have both one skill and two skills. You can use these two skills in combat to enhance your combat ability.