Cheng Hao has been engaged in political activities all his life. He was a scholar in the second year of Jia's reign (1057), and served as the master book of Huxian County (now Shaanxi Province) in Jingzhaofu the following year. He has served as the chief officer of Shangyuan County (now Jiangsu) and Zezhou Jincheng (now Shanxi). In the second year of Xining in Song Shenzong (1096), in February, Wang Anshi became the right doctor to participate in politics, and set up three divisions, with Cheng Hao as his subordinate. In August of the same year, because of Cheng's recommendation, Cheng Hao was appointed as the crown prince, and was appointed as an official to participate in the discussion of current politics. He wrote more than ten chapters against Wang Anshi's political reform. The following year, the book was changed to Zhenning Army Day. The following year, the Yellow River burst in Caocun, Zhuozhou, and he personally led the troops to rescue.
After five years in Xining (1072), Cheng Hao successively served as the inspector of bamboo and wood affairs in Xining, the inspector of Fugou County and the inspector of wine tax in Ruzhou, but he devoted more time and energy to academics and education.
In March of the eighth year of Yuanfeng (1085), Song Shenzong died of illness, and Ren Xuan came to the court to listen to politics. Sima Guang returned to Beijing as an assistant minister and called Cheng Hao Dian Cheng. Hao Cheng fell ill and died before he left. At the age of 53.
Cheng Yi spends most of his time on academic research and educational activities. Traveling in imperial academy at the age of 24, he was discovered by Hu Yuan, the host of imperial academy, and took up an academic post. Lv Xizhe, the son of the powerful minister Lv Gong, first worshipped Cheng Yi as a teacher, and later more and more scholars followed him. In the following 30 years, Cheng Yi gave lectures not only in Kaifeng, but also in Hanzhou, Xuzhou, Luoyang, Guanzhong and other places, and studied under the famous scholar Zhang Zai at that time, and received many students such as You Dingfu, Lu Dalin and Zhou Chunming, which was a great success.
When Cheng Yi was in his fifties, due to the recommendation of Sima Guang and Lv Gong, he served as Professor imperial academy of Xijing, secretary of the provincial school and storyteller of Chongzheng Hall. Due to disagreement with Su Shi and others, he left Kaifeng House in the second year of Yuan Dynasty (1087) in August, and returned to Xijing Luoyang to continue teaching, taking in Shi Yang, You Zuo and other disciples.
Born four years less in the spring (1097), the cronies reconvened and Cheng Yi was released. At the end of the same year, it was sent to Fuzhou (now Fuling, Chongqing) for editing. Song Huizong was pardoned after he ascended the throne and returned to Luoyang. In exile for more than ten years, he completed Yi Zhuan Yi Zhuan, took Luo Congyan as a disciple, and taught Yi Xue. In October of Fu Yuan's third year (1 100), Lang Quan was appointed as imperial academy of Xijing, and Zhang Yi and others met the teacher. In the second year of worshiping Ning (1 103), Fan said that "Cheng acted in heresy, confusing people's hearing" and that "writing books is not to destroy the sacred dynasty", and the court ordered that "the words he wrote should be destroyed and made known to the supervisors". Cheng Yi was disheartened and retreated to the foot of the mountain on the eighth floor south of Longmen, Luoyang (now Chengcun, Songxian County). Three years later, Cheng Yi was reinstated as Xuanyilang. He died in the first year of Daguan (1 107).
Cheng Hao and Cheng Yi suffered exclusion and relegation for a long time, and it was not until the late Southern Song Dynasty that Cheng Hao's social status began to improve. In the 13th year of Jiading, Song Ningzong (1220), Cheng Hao was named "pure man" and Cheng Yi was named "righteous man". In the first year of Li Zongchun (124 1), Cheng Hao posthumous title Henan Bo, Cheng Yi posthumous title Yichuan Bo, the "Confucius Temple". In the first year of Shunzhi (1330), Cheng Hao was made a duke, and Cheng Yi was made a duke. Injong built Chongwen Pavilion in imperial academy in the following year (13 13), and took Cheng Yi as Luogong. The year after Emperor Injong (13 13) did not dare to build a Chongwen Pavilion in imperial academy, and ten people, including Cheng Hao and Cheng Yi, "worshipped Confucius House". In the sixth year of Jingtai, Ming Daizong (1455), imperial academy wrote a eulogy with pigs and sheep at Liangcheng Temple in the Spring and Autumn Period, appointed four guards and issued the eulogy. Taking Yanzi (that is, Yan Yuan) as an example, the regulation is better than Queli, and there are more than 60 front and back halls, such as the fasting room, which praises the Bidong Temple for "clarifying the orthodoxy and improving the gentleness." This is the sage, and I am a descendant. "In the first year of Emperor Kangxi of the Qing Dynasty (1662), it was decreed that the descendants of Cheng Cheng lived in other places, except for the overcharged money, they were generally exempted from running miscellaneous schools. In nine years, Cheng Zongchang and Cheng Zisun Cheng Yansi inherited the Five Classics from imperial academy. In twenty-five years, Er Cheng became a Confucian and became a saint, ranking above Confucius and other Confucians in Han and Tang Dynasties. The following year, Emperor Kangxi also gave the two temples a plaque of "Learning to be Excellent and Being an Official". In forty-one years, the court decided to give forty-two taels of silver every year to two people. In the 16th year of Qianlong (175 1), the emperor sent envoys to offer imperial sacrifices to Ercheng. In the eulogy, he said that "Daoguang is rich in stones, making contributions to the legacy" and "learning from books is honest and clear, and naturally becoming great" were the "true Confucianism" and "philosophers" of the immortals, and distributed 60 hectares to Cheng Yi's twenty-fifth generation grandchildren successively. In the 27th year of Guangxu (190 1), Emperor Guangxu and Empress Dowager Cixi visited Longmen, Luoyang, and specially sent a courtesy prince to visit the two monasteries, and presented two memorial tablets, "Luo Yi Yuanyuan" and "West Wild Goose Gate". Neo-Confucianism advocated feudal ethics and emphasized ethical politics, which gradually became the official philosophy. It occupied a dominant position in the ideological field in the late feudal society of China for nearly a thousand years, and also had a certain influence on some countries in Southeast Asia.
Because of Cheng Cheng's outstanding contribution, the Cheng surname in his hometown called their previous lineage as the upper lineage and regarded them as the ancestors of the lower lineage, while the Cheng surname in the region gradually became the authentic Cheng surname in Henan.