Skill Points
1. Skill points can be used to upgrade skill level. One skill point will upgrade a skill by one level.
2. You can accumulate up to 20 skill points. Become VIP1 to extend the limit to 30, and VIP4 for 40 skill points.
3. If your skill points are not full, you will automatically restore 1 point every 10 minutes.
4. When your skill points reach 0, you can spend 20 diamonds to buy 10 skill points.