In the 16th year of Qianlong, because of his father Liu Tongxun, Liu Yong took part in the Huiyuan Imperial Examination and the palace examination in that year, and won the second place in the Second Imperial Examination. He was awarded Jishi Shu, also known as Shu Chang, Academician College, and worked as a document editor in scattered museums. Soon he was promoted to be a lecturer, giving lectures to emperors or princes, which became the starting point of his career. In October of the 20th year of Qianlong, Liu Yong's father, Liu Tongxun, was imprisoned for failing to handle military affairs, and Liu Yong was also punished for his participation. Later, the father and son were released, and Liu Yong was reduced to imperial academy for editing. In June of the 21st year of Qianlong, Liu Yong served as the examiner of Guangxi after having obtained the provincial examination, and in October he was promoted to Zheng Xue, Anhui Province, which belongs to the central government. During his tenure, Liu Yong put forward practical remedial measures in view of the chaotic management of Hezi at that time, which was affirmed by Emperor Qianlong.
In October of the 24th year of Qianlong, Liu Yong was transferred to the position of the top scholar in Jiangsu Academic and Political Examination. Emperor Qianlong also presented poems before his appointment, which shows that he has high hopes for Liu Yong. Liu Yong lived up to his mission and was serious about politics. When he became a student, he tried Yangzhou. Due to strict control, some people who want to cheat finally dare not enter the stadium. This view is profound and pertinent, which won the appreciation of Emperor Qianlong and praised him for knowing the political system. Liu Yong served as the magistrate of Jiangsu twice to study politics, and in the later period, his official style changed from strict rigidity to peace and soothing, but his seriousness was consistent. Ganlong was promoted to Jining Daotai in thirty years. The following year, Liu Yong was sentenced to death for failing to inspect the ridge section of Yangqu County, and successfully encroached on the state treasury silver. However, Emperor Qianlong loved talents, and turned around the enemy. He only sent military units to deliver military newspapers to atone for his sins. After being pardoned the next year, he walked into the book repair office.
After all, Liu Yong is talented and the emperor loves talents, so he didn't punish him too much.