|Father||King Zhuangxiang of Qin|
Chengjiao, titled Lord of Chang'an (長安君 Chǎng'ān Jūn), was Qin Shi Huang's paternal half brother. After Zhao Zheng inherited the title of King of Qin from his father King Zhuangxiang, he rebelled at Tunliu and surrendered to the State of Zhao. King Daoxiang of Zhao granted him the territory of Rao (饒; modern Raoyang County, Hebei).
In popular culture
In Kingdom, he launched a coup that tried to kill Qin Shi Huang alongside his own faction. He was later overthrown by Wenchang-jun, Li Xin, loyalists and the mountain tribes. He was later pardoned and allowed leadership during Qin Shi Huang's campaigns. He was also appointed leader during a border war, but torn when the city he expected to be defended, rebelled. He was later killed by a rebel commander after being cornered, using him as an excuse to forment distrust to his brother.