Player level 1 to 59. At present, you can learn from teachers normally without a master. When the player's level reaches 60 or above, and there is no master at present, and the apprentice information is empty, the player can forcibly accept the apprentice.

Rules for accepting apprentices:

Players with a level above 60 who have no apprentices or have started apprenticeships and the number of apprentices (excluding apprentices who have started apprenticeships) has not reached the upper limit can accept apprentices. Players can establish a mentoring relationship by applying to other players. If the other party refuses, the relationship will fail.