In the original novel of Chang 'an Twelve Hours, Yuchang was a very dangerous, cunning, and ambitious character. She was a spy who was sent to Chang 'an City to investigate intelligence, but because of her outstanding performance, she was appreciated by the high-ranking forces. Yuchang used his intelligence and wit to travel around Chang 'an City to collect intelligence and report information. He had also successfully helped the high-level forces to attack other forces many times. She was smart and resourceful, good at socializing, understood the complexity of people's hearts, and could accurately grasp the weaknesses of others. However, Yuchang also had his own greed and ambition, hoping to become a higher-level spy to obtain more power and benefits. In Chang 'an, her interests and standpoint were different from others. She often used unscrupulous means to sacrifice the interests of others for her own interests. In the novel, Yuchang was a very charming and dangerous character. Her intelligence and wit allowed her to wander around Chang 'an City and win many benefits for the high-ranking forces. However, her greed and ambition also made her unscrupulous and even willing to sacrifice the interests of others. In the end, she was attacked by other forces and was arrested and executed.