2. It is not a matter of insufficient loyalty. After a pet reaches full experience, it can only be combined with other pets with full experience (in Qixingtang). The level of the combined pet is the sum of the levels of the original pet. (If it does not combine, its power to fight monsters It will be obviously more powerful than before!) The highest level of pets can be combined is 12. No matter how full the experience is, they can no longer be combined. You will get a lot of experience when it kills monsters.