|Other names||Zhongzhi (仲治)|
|Relatives||Xin Pi (brother)|
Xin Ping was from Yangzhai County (陽翟縣), Yingchuan Commandery (潁川郡), which is around present-day Yuzhou, Henan. His ancestors were actually from Longxi Commandery (隴西郡; around present-day Dingxi, Gansu), but they migrated to Yingchuan Commandery during the Jianwu era (25–56 CE) of the reign of Emperor Guangwu in the early Eastern Han dynasty.
Xin Ping started his career as an adviser to the warlord Han Fu, who governed Ji Province (covering much of present-day Hebei) from 189 to 191. In 191, Xin Ping, along with Xun Chen and Guo Tu, managed to persuade Han Fu to give up his governorship of Ji Province to another warlord Yuan Shao, who they said would be in a better position to defend Ji Province from an invasion by a rival warlord Gongsun Zan. Xin Ping subsequently became an official serving under Yuan Shao, and he brought along his younger brother Xin Pi.
In the year 200, Yuan Shao clashed with his rival Cao Cao at the Battle of Guandu. During the battle, two sons of Yuan Shao's adviser Shen Pei were captured by Cao Cao's forces. Meng Dai (孟岱), one of Yuan Shao's subordinates, was not on good terms with Shen Pei, so he asked his colleague Jiang Qi (蔣奇) to pass a message to Yuan Shao: "Shen Pei has been behaving autocratically and he has strong support from his kinsmen. Now that his two sons have been captured by the enemy, he may think of defecting to the enemy to save his sons." Xin Ping and his colleague Guo Tu agreed with Meng Dai. Yuan Shao thus appointed Meng Dai as his new army supervisor and ordered him to replace Shen Pei as the officer guarding his home base in Ye (present-day Handan, Hebei).
In 202, two years after his disastrous defeat at the Battle of Guandu, Yuan Shao died without clearly naming one of his sons as his successor. A power struggle thus broke out between two of his sons, Yuan Tan and Yuan Shang, over the succession. Yuan Shao's followers were also divided into two camps: one camp, led by Shen Pei and Pang Ji, supported Yuan Shang and helped him gain control over Ye city; the other camp, led by Xin Ping and Guo Tu, sided with Yuan Tan, who based himself in Pingyuan County. The Yuan brothers then waged war against each other.
In 203, when Yuan Shang attacked Yuan Tan at Pingyuan County, Guo Tu advised Yuan Tan to make peace with Cao Cao and ally with Cao Cao to counter Yuan Shang. After Yuan Tan reluctantly agreed, Guo Tu nominated Xin Ping's brother Xin Pi to serve as Yuan Tan's representative to meet Cao Cao. Xin Pi succeeded in his mission and managed to convince Cao Cao to help Yuan Tan. Cao Cao then led his forces to Liyang (黎陽; present-day Xun County, Henan).
Earlier on, when conflict first broke out between Yuan Shang and Yuan Tan, Xin Ping's brother Xin Pi accompanied Yuan Tan to Pingyuan County but left his family members behind in Yuan Shang's base at Ye city. Yuan Shang later ordered the Xin family to be arrested and imprisoned. In 204, Cao Cao led his forces to attack Yuan Shang at the Battle of Ye. When Cao Cao's forces broke through Ye's defences, Shen Pei, who was in charge of defending Ye, blamed Xin Pi for the Yuan family's downfall so he ordered his men to execute the Xin family in prison. After Ye fell to Cao Cao's forces, Xin Pi, who was with Cao Cao at the time, rushed to the prison to free his family but it was too late as all of them were already dead.
While it is unknown whether Xin Ping was executed along with his family, there is no further mention of him in historical records.
- de Crespigny (2007), p. 897.
- (辛毗字佐治，潁川陽翟人也。) Sanguozhi vol. 25.
- (其先建武中，自隴西東遷。) Sanguozhi vol. 25.
- Sima (1084), vol. 60.
- (毗隨兄評從袁紹。) Sanguozhi vol. 25.
- (官渡之敗，審配二子為曹操所禽。孟岱與配有隙，因蔣奇言於紹曰：「配在位專政，族大兵強，且二子在南，必懷反畔。」郭圖、辛評亦為然。紹遂以岱為監軍，代配守鄴。) Houhanshu vol. 74 (Part 1).
- Sima (1084), vol. 64.
- (英雄記曰：審配任用，與紀不睦，辛評、郭圖皆比於譚。) Yingxiong Ji annotation in Houhanshu vol. 74 (Part 1).
- (及袁尚攻兄譚於平原，譚使毗詣太祖求和。) Sanguozhi vol. 25.
- (英雄記曰：譚、尚戰於外門，譚軍敗奔北。郭圖說譚曰：「今將軍國小兵少，糧匱勢弱，顯甫之來，久則不敵。愚以為可呼曹公來擊顯甫。曹公至，必先攻鄴，顯甫還救。將軍引兵而西，自鄴以北皆可虜得。若顯甫軍破，其兵奔亡，又可斂取以拒曹公。曹公遠僑而來，糧餉不繼，必自逃去。比此之際，趙國以北皆我之有，亦足與曹公為對矣。不然，不諧。」譚始不納，後遂從之。問圖：「誰可使？」圖荅：「辛佐治可。」譚遂遣毗詣太祖。) Yingxiong Ji annotation in Sanguozhi vol. 25.
- (太祖曰：「善。」乃許譚平，次于黎陽。) Sanguozhi vol. 25.
- (先賢行狀曰： ... 初，譚之去，皆呼辛毗、郭圖家得出，而辛評家獨被收。及配兄子開城門內兵，時配在城東南角樓上，望見太祖兵入，忿辛、郭壞敗兾州，乃遣人馳詣鄴獄，指殺仲治家。是時，辛毗在軍，聞門開，馳走詣獄，欲解其兄家，兄家已死。) Xianxian Xingzhuang annotation in Sanguozhi vol. 6.
- Chen, Shou (3rd century). Records of the Three Kingdoms (Sanguozhi).
- de Crespigny, Rafe (2007). A Biographical Dictionary of Later Han to the Three Kingdoms 23-220 AD. Leiden: Brill. ISBN 9789004156050.
- Fan, Ye (5th century). Book of the Later Han (Houhanshu).
- Pei, Songzhi (5th century). Annotations to Records of the Three Kingdoms (Sanguozhi zhu).
- Sima, Guang (1084). Zizhi Tongjian.