Swordsman 1st Class Advancement

When you've reach level 30 go to Francis Town and talk to the town Chief Automan. And automan will talk about your class advancement and he will tell you to talk to Zerald for you 1st adancement

After you talk to Automan go to Wonderplus Gas Station and talk to NPC Zerald to accept the 1st class quest.

Then go back to Francis town and in the center of the town enter into the mission portal and defeat Mark.

After you defeat Mark go back to Zerald in Wonderplus Gas Station and choose from Warrior or Knight.