The eldest son of the Marquis of Chengguo and Cheng Weining's older brother. He is lean and appears well-behaved on the surface but is actually despicable underneath. He was a notorious womanizer and flower thief who targeted courtesans before age eighteen, which caused his kidney issues and anemia. He stole his brother's achievements and credit, including saving the second princess. He drugged an old general with sleeping pills and led 30,000 soldiers to their deaths by sending them to fill a swamp during a war with Shu Kingdom. He is jealous and scheming.
