Kunlun
The way to Kunlun is smooth due to the monsters being dealt with by the guards that came to Yinyue's rescue. Adrian did not need to step up and just happily accepted the experience points being showered to him albeit it is not a large amount.
Adrian also learned a lot about the types of job classes in the eastern continent. The only difference with the job classes in the eastern continent with the central continent is how they progress.
In the central continent, skills are provided via levels, but those skills are not that powerful in the start. The mastery will rise in time with repeated use of the skill, but it will start off as a weak skill. In the eastern continent, skills that are previously obtained must be mastered first before moving to another skill, but the skills are powerful from the start.