Talk to the guard outside where the Job masters are stationed. He should say something about him getting married and that he needs a nine fox crown. Go to Smith Jangeo and he will say that you may kill the Nine Tailed foxes if you kill 30 BF (BLACK FORTRESS XD) Leg fighters. Go out of town and cross the northern bridge into the Ruined Village territory. The BF fighters are there. Make sure you stock up on potions as when you start off, they hit hard. You can buy martial empires gold here.
When you have killed them, go north east from the bridge and the nine tailed foxes are there. Go back to the guard to complete this quest in Martial Empires. This is the big quest, you have to take this quest to go much further. Unless you plan on leveling without skills. Go to the Job Masters, house and talk to your job master. Each job has an individual skill. Assassin has to get the Crystal Clear China.