Lan Zhan (蓝湛, Lán Zhàn), courtesy name Lan Wangji (蓝忘机, Lán Wàngjī) is the second young master of the Gusu Lan Clan. Titled as Hanguang-Jun (含光君, Hánguāng-jūn), Lan Wangji is one of the Twin Jades of Lan, alongside his older brother, Lan Xichen. (If you take off his headband it means he has to marry you)