Prince Li Chengji pretended to be mute for many years in order to protect himself. The envoys of the foreign countries openly attacked and humiliated Dayan in the court. He resolutely broke the silence, exposed the enemy's secrets with amazing wisdom, and defended the dignity of the country. The emperor's father appreciated his talent and ordered him to approve memorials and learn how to handle state affairs. Since then, he has successively proposed plans to benefit the people, such as "abolition of canals and conversion to sea" and the introduction of "Champa rice". He used his youthful wisdom to help stabilize the country and make the people prosperous, and wrote an admirable growth legend.
