During the Yongkang period, the Shan Kingdom repeatedly approached the border of the Sheng Kingdom. Tongjia Pass was located at the junction of the Sheng Kingdom and the Shan Kingdom. The terrain was complex, making it easy to defend but difficult to attack. Shan Guo's repeated attacks failed, so he sent King Zuo Xian to sneak into Sheng Guo in disguise with a small number of troops.
Yang Xi, the princess of the Sheng Kingdom, was trapped in the palace for many years. Her mother was a native of Shan. From her mother's mouth, Yang Xi learned about the world outside the palace and the beautiful scenery of Shan's frontier. She yearned for the ancient frontier country that her mother told her about, and wanted to return to her hometown for her mother to fulfill her mother's wish during her lifetime.
However, Yang Xi, who had just escaped from the deep palace, was ignorant of the outside world. With his knowledge of the deep palace, he was captured by King Zuo Xian, Hu Yanshi, and brought back to the country of Shan for use. Yang Xi accidentally learned that it was the country of Shan, and wanted to escape from the officers and soldiers of the country of Sheng, so he followed his plan and followed King Zuo Xian back to the country of Shan. Yang Xi saw the desert scenery of the Shan Kingdom and discovered that King Zuoxian, like himself, did not want to see the two countries at war and the people displaced. Gradually, he fell in love with King Zuoxian. The two of them worked together to promote the union of the two countries and the well-being of the people. He traveled to the desert with King Zuoxian Huyanshi.
Purpose: In ancient times, when countries coexisted peacefully, the people were healthy and lovers traveled together.