I Want to Develop a Line from Zang Yun's Double-Faced Prince!

In the prosperous times, who is willing to guard your spring water and make tea? When troubled times come, who will sacrifice their lives to accompany you until the end? Zhang Yan was fortunate that fate did not force him into an alley. He had only one person, Lian Heng, from beginning to end. Lian Heng thought that he was the boudoir daughter who was well-liked by everyone, and Zhang Yan thought that he was the eldest son and grandson who lived in the underworld and had no one to love him. The two gears that fit together rolled over the glory of the family. The invasion of troubled times transformed them into separate factions. The princes and princesses who rebuilt the new dynasty sat together in piles of gold and silver, and enjoyed the grand family.