在某次更新后，从 player_class_stats 表中分离出来。
表结构
The character class. This field defines what values to apply to the stats of a character. This value is taken from ChrClasses.dbc.
The level at which the stats should be applied.
The base health points to be applied to a character. Applied before stamina bonuses.
The base mana to be applied to a character. Applied before intellect bonuses.