When Xuefeng told his parents that he is leaving to explore the world, they were quite worried at first and Liu Xiaobei even decided to test his son's skills first. Even if he had Xiao Wen with him for protection, he still had to be able to protect himself.
For his parents to be able to stay home without any worries, Xuefeng was supposed to strike the black wall in Clan Leader's study, and leave a half a foot deep hole in it. When he heard of this challenge Xuefeng was more than happy to take it. He still had some unfinished business with that black rock.