Peng is from Huayang, Yizhou. When I was young, because I loved learning, I became famous in the state and was admitted to Jinshi. I once boarded the Suoguo Pavilion together with those who were admitted to the Jinshi in those years, and my peers all looked at their hometown, showing the happiness of being an official. Only Peng took advantage of the west and said, "My parents are old. How can I give up serving them in the morning and evening and only consider my own honor and disgrace?" "The next day, the court was asked to allow (him) to go home to serve his adoptive parents. A few days later, he was appointed as the judge of Hanyang Army, and his wish to return to his hometown came true. After a long time, someone recommended him for his outstanding words and deeds, called him into the exam, and was appointed as the organizer in the pavilion. He resolutely refused and asked to return to his hometown, and later became an official in Yingyong, Fengzhou.

At the beginning of Tianxi, because of Kou Zhun's recommendation, (Cheng Peng) was appointed as the collator of Guange and the sacrificial officer of Tianpingjun. Participated in southern history, northern history and collating, was appointed as secretary of the provincial Ministry of Industry Zuo Lang, and was promoted to supervisor of Cheng and Ji Xian in this province. He begged (the imperial court) to take care of his parents conveniently, so that he could be appointed as the magistrate of Zhou Pu. Shu people can be the chief executive of their hometown from the beginning. People in Zhou Pu seldom know how to study, so Cheng Peng established schools for them and called their children educational students. Cheng Peng's father was buried after his death, and the dew fell on the cypress, which is considered to be the result of Cheng Peng's filial piety. After the funeral, he was appointed as Jingmen Army and changed to Doctor Taichang. (Later) he was recalled to the imperial court, entered the punishments department of Shangshu, served as the magistrate of Anzhou, transferred to Jingxi Prison, and changed to the transfer ambassador of Kuizhou Road. It coincides with the collusion of the local thief Tanaka Ba, and Xizhou people want to invade the mainland. Cheng Penggang visited all counties and came to this county. He called border officials on a large scale and led troops down the mountain to guard against the thieves. (Cheng Peng) So he sent people to alienate him. The thief beheaded Tanaka Ba and killed his whole family. (Later, Cheng Peng was called into Ren Xiu's Juzhu, and was promoted to Zhi Zhi's patent. He was promoted to the doctor of the Ministry of Industry for many times, joined the Hanlin as a bachelor, led the official department's ministers and third-class hospitals, and worked as a Yong ying herdsman. After he fell ill, Renzong ordered the imperial doctor to diagnose him in the palace and give him precious medicine. (Cheng Peng) died, giving three hundred and twenty platinum. Please give an official to Cheng Peng, but the court won't allow it, and ordered a son of Cheng Peng to mourn.

At the beginning, Cheng Peng was among the candidates. The emperor pointed to Cheng Peng and said, "This is an old Confucian scholar with a reputation of being indifferent and modest. No one can replace him." When summoned, the emperor told him: "You are an old courtier and have been working in other places, but you have never made representations yourself." (Cheng Peng) replied: "I was born in a remote place and I know my own abilities. How dare I have excessive hopes?" The emperor praised him. Peng Chenghou is solemn and quiet, simple and filial, and doesn't like buying property. I have collected more than 10,000 books, all of which were published and proofread by myself. Many books circulated in Shu were written by Cheng Peng. In his later years, he was in charge of imperial edicts, but he didn't pay enough attention to words.