Hello, is it true that the highest level of all skills in all classes after the fourth shift is 10 by default, and the highest level of skills needs to be upgraded through the energy manual, such as 20, 30. For example, the highest level of the original skill of a book 20 is 10, that is to say, if it is added to 10, it cannot be added, but if the energy manual is used successfully, the highest level of this skill will become 20, and it can be added or will consume SP.