The New Moon Shines on Chang'an

After the An-Shi Rebellion, the Tang Dynasty gradually lost control of the world, with vassal towns segregated and eunuchs taking power. The old emperor had gone through many vicissitudes of life, and he just wanted to live a comfortable life for a few days in his later years, unwilling to cause trouble, and turned a blind eye to the princes of all parties. But among a group of pampered princes and grandsons in Chang'an City, there was a restless young man who vowed to use his long sword to cut through the dark night and create a peaceful and prosperous age for the world...