Zhao Chang (730-814), whose name was Hong Zuo, was born in Tianshui (now Tianshui, Gansu). The assistant to Li Chengzhao, who was the first envoy of Zhaoyi Jiedushi, was tired and moved to Annan to protect him. After Tang Xianzong Li Chun succeeded to the throne, he worshipped Zhao Chang as the official secretary of the school's household inspection department and was promoted to the Lingnan Jiedu Envoy. Later, he was appointed as Jingnan Jiedu Envoy. Official to Prince Shaobao. At the age of eighty-five years old, he was awarded the posthumous posthumous title of the governor of Yangzhou.