During the Tang Dynasty, the marriage of a prince and a crown princess required a series of ceremonies, including: 1. Engagement: When the prince and the crown princess are engaged, they need etiquette, and both family representatives should attend, and the crown princess's family needs to give the prince a dowry. 2. Engagement: Engagement is a formal announcement that the prince and the crown princess are married, which requires a grand ceremony, presided over by the emperor. The Crown Prince and the Crown Princess need to meet the emperor and the empresses three times in the court to express their willingness to sacrifice to heaven and earth, ancestors, the emperor and the empresses. Later, the emperor will announce the marriage of the prince and the princess, and issue books (in the form of aristocratic bans) to approve the marriage. 3. Wedding Ceremony: The Crown Prince and Princess will enter the palace with the dowry and wedding ceremony team, and the prince will lead the court officials to meet her. 4. Wedding: The wedding of the prince and the crown princess was held in the palace. The ceremony was very grand, with music and dance performances, church worship, flowers and other links, presided over by the emperor. After the wedding, the prince and the crown princess returned to the prince's residence and continued to hold activities such as receiving guests and entertaining guests. In short, the wedding of the prince and the crown princess in the Tang Dynasty was quite grand, involving many characters and etiquette such as the emperor, court ministers, relatives and friends.