Fast horses came from the south of the Yangtze River and galloped into the capital. So everyone from the emperor to the common people knew that the state of Yan south of Nanhu had surrendered. The only descendant of the king of Yan State, the only eldest princess of Yan State, was given to Emperor Daxi by her biological father, and was betrothed by the emperor to the seventy-three-year-old prime minister as a concubine. The southern frontier army of Daxi took over another city, named Yongzhou. Emperor Long Yan was very happy and sent the emperor's personal troops to suppress the attack. He also personally issued an order for the generals to lead the troops and personally welcome Princess Yan into the city.