sentences:  Gao Huan defeated the Erzhus in 532 and entered Luoyang victoriously, and he made Yuan Xiu the Prince of Pingyang emperor (as Emperor Xiaowu).As a result of Gao Huan's victory, the 11-year-old Gao Cheng received high ranking titles, even though he appeared to carry no actual responsibility by this point in either the imperial administration or his father's army.With his father having been created the Prince of Bohai, Gao Cheng, as his oldest son, also carried the title the Heir Apparent of Bohai.