Click on the Daily Mission icon to enter 

Daily Mission unlocks at Lvl.26, complete quests in Daily Mission to get large amounts of EXP. Players will be rewarded with a Stamina Pack upon completing 10 Daily Missions.Since this is a relatively easy way to level up quickly in the early stages it is recommended that players use this system. VIPs have extra incentive to use it since they can complete Daily Missions at a much faster rate.