|King of Chu|
223 BC – 223 BC
|Prime Minister of Qin|
237 BC – 223 BC
|Preceded by||Lü Buwei|
|Relations||King Qingxiang of Chu (paternal grandfather)|
King Kaolie of Chu (father)
King Zhaoxiang of Qin (maternal grandfather)
King You of Chu, King Ai of Chu and Fuchu (brother)
Lord Changping (昌平君; died 223 BC) was a general and lord of Qin, but later seceded from Qin and died as the last king of Chu (224–223 BC) in the last days of the Warring States period of ancient China.
Accounts in the Records of the Grand Historian
The king found out this fact and ordered the chancellor (Lü Buwei) to let Lord Changping and Lord Changwen lead soldiers and attack Lao Ai. They battled at Xianyang (the capital of Qin) and killed hundreds [of the rebels]. [For this deed,] they all received the peerage. Also, all eunuchs who battled [against Lao Ai] received one higher peerage than before.
Although Lao Ai fled from this battle, he was ultimately captured and executed.
In 226 BC,
Xiang Yan, general of Jing (another name of Chu), adopted Lord Changping as the king of Jing and resisted against Qin at Huainan. In the 24th year (223 BC), Wang Jian and Meng Wu assaulted Jing and defeated the Jing army. Lord Changping died and Xiang Yan finally put an end to himself. 
To the contrary, Vol. 40: House of Chu records Fuchu as the last king of Chu and does not mention Lord Changping. Furthermore, the order of events is utterly reversed compared to the accounts in Vol. 6; the army of Qin killed General Xiang Yan in 224 BC and then captured Fuchu in 223 BC.
He was the son of King Kaolie of Chu. Lord Changping's three predecessors were all his brothers: King You, King Ai, and Fuchu. He died from an arrow wound.
In Popular Culture
In the manga series, Kingdom, he is the commander-in-chief of the army in the court of Qin later became a Minister of the Right then became a Prime Minister after Lu Buwei's disgrace, providing some assistance towards the unification of China. In Yasuhisa Hara's one shot manga written before Kingdom was serialized, he was referred as a former Qin official and prime minister, until he snapped and defected to Chu when his former homeland was going to be invaded and he cannot pass any tactics to Ying Zheng. He was killed when his former friend, a Qin general Meng Wu fought him.
- Records of the Grand Historian, Vol. 6: Annals of Qin Shi Huang. 
- Annals of Qin Shi Huang, the 9th year of Qin Shi Huang. 王知之，令相國昌平君、昌文君發卒攻毐。戰咸陽，斬首數百，皆拜爵，及宦者皆在戰中，亦拜爵一級。
- Annals of Qin Shi Huang, the 21st year of Qin Shi Huang. 昌平君徙於郢。
- Annals of Qin Shi Huang, the 23–24th year of Qin Shi Huang. 荊將項燕立昌平君為荊王，反秦於淮南。二十四年，王翦、蒙武攻荊，破荊軍，昌平君死，項燕遂自殺。
- Records of the Grand Historian, Vol. 40: House of Chu
- 秦始皇第二任丞相昌平君如何成为末代楚王 Archived 2009-09-26 at the Wayback Machine.
Lord ChangpingDied: 223 BC
| King of Chu
|Conquered by Qin|