Liu Yong was born in a noble family and his ancestors were all scholars. His father, Liu Tongxun, was a cabinet official and a great minister, and was deeply trusted by Emperor Qianlong. Therefore, Liu Yong's official career has a deep family origin. Liu Yong has been an official for more than 50 years, and his career has been ups and downs. After several ups and downs, he became a university student in Tijen Pavilion. On the whole, he is honest and enjoys a reputation of innocence. He inherited the mantle of his father, Liu Tongxun, and became an important minister in Qianlong and Jiaqing Dynasties.