Chang Feng is not the protagonist in Know No, but a character aiming at stabilizing Lin Xiaoniang's position and highlighting Lin Xiaoniang's failure to educate her children. When it comes to Changfeng's later changes, it can't be separated from his wife. There is no special performance in the TV series, but it is described in the original novel: Changfeng married his wife shortly after Lin Xiaoniang's death, and his wife Liu, though plain-looking, was a virtuous woman. Liu urged Changfeng to get rid of the habit of attending parties and study hard. Persuaded by his wife, Changfeng turned over a new leaf and finally became famous.

Anyone who has seen the TV series or novels of Know No knows that Changfeng is not bad in nature, even a little simple. There are some deviations in life and making friends, but more because of the influence of her biological mother Lin Xiaoniang. In order to gain more status and wealth in the Sheng family, Lin Xiaoniang often takes some extreme measures to frame other wives and concubines, and often instigates a pair of children and other brothers and sisters to compete for her father's attention. As a result, Longfeng was admitted before she got married, not only because she was careless in making friends, but also because she almost killed her father and was punished by the government.

Later, because of some crimes committed by her biological mother Lin Xiaoniang, she was discovered by her father and died shortly after being punished. Without Lin Xiaoniang's favor, Changfeng has converged instead. Married Liu's wife at his father's decision. Liu didn't care about Chang Feng's past misdeeds, and she didn't just want to instigate Chang Feng to compete for the family business like Lin Xiaoniang. Instead, he waited on Chang Feng gently, encouraged Chang Feng to work hard, changed his bad habits in the past, and made great efforts to become famous.

The change of Changfeng reminds us of an old saying, that is? Men are afraid of going into the wrong business, and women are afraid of marrying the wrong person? In fact, not only women are afraid of marrying the wrong husband, but men are also afraid of marrying the wrong wife. If a man marries a virtuous wife, it is to help his husband get on the right path. On the other hand, if you marry a domineering wife, it will not only make your family restless, but also make your husband go astray.