Cheng Yi 成宜

According to the Annals of Emperor Wu in Records of Wei 1, in the 3rd month of the 16th year of Jian'an (211), since Zhang Lu held Hanzhong, Cao Cao sent Zhong Yao to attack him and had Xiahou Yuan and others go out to Hedong to join Zhong Yao. At this time the generals of Guanzhong suspected that Zhong Yao meant to attack them, and Ma Chao finally rebelled together with Han Sui, Yang Qiu, Li Kan, Cheng Yi and others. Cao Cao sent Cao Ren to attack them. Records, Wei 1 §109–110

When Ma Chao and the others camped at Tong Pass, Cao Cao set out west in the autumn, in the 7th month, and encamped facing them across Tong Pass. When Cao Cao crossed the Yellow River and set up camp south of the Wei River, Ma Chao and the others camped south of the Wei River and asked for the land west of the Yellow River to be ceded to them, suing for peace, but Cao Cao did not consent. In the 9th month Cao Cao crossed the Wei River, and using Jia Xu's plan he pretended to grant the request to cede land; then he talked with Han Sui with their horses side by side about nothing but old times and sent him a letter with erasures and corrections, so that Ma Chao and the others grew even more suspicious of Han Sui. Records, Wei 1 §110–113

Cao Cao fixed a day for a decisive battle. He first provoked the enemy with light troops, and after fighting for a long while he at last let loose his Tiger Cavalry to attack from both sides, crushed them and beheaded Cheng Yi, Li Kan and others. Han Sui, Ma Chao and the others fled to Liang Province, Yang Qiu fled to Anding, and Guanzhong was pacified. Records, Wei 1 §113

The account of Ma Chao in the Biographies of Guan, Zhang, Ma, Huang and Zhao in Records of Shu 6 also records that when Ma Chao took command of the troops, he allied with Han Sui, joined hands with Yang Qiu, Li Kan, Cheng Yi and others, and advanced to Tong Pass. Cao Cao, using Jia Xu's plan, set Ma Chao and Han Sui against each other so that they grew suspicious of one another, and their army suffered a great defeat. Records, Shu 6 §27

In the 5th month of the 18th year of Jian'an (213), the Son of Heaven gave the Imperial Counselor Xi Lü the imperial tally and issued an edict making Cao Cao Duke of Wei. Listing Cao Cao's achievements one by one, the edict stated that Ma Chao and Cheng Yi, sharing in evil and aiding each other, had relied on the banks of the Yellow River and Tong Pass to pursue their own desires, but that he annihilated them south of the Wei River, the ears of the enemy presented were counted by the ten thousand, and he at last pacified the frontier and soothed the Rong and Di into peace. Records, Wei 1 §121 · 126

In Chen Shou's main text, Cheng Yi's name appears only in these four places, and his courtesy name, place of origin and offices are not recorded. Records, Wei 1 §110 · 113 · 126Records, Shu 6 §27