In the Beginning, We Were Sworn in Taoyuan and I Was Taken Away.

"Remember Liu Bei, Guan Yu, Zhang Fei, and He Yue. Although they have different surnames, they are brothers and work together to rescue the poor and help the people in danger. They report to the country and make peace for the common people. They do not wish to be born in the same year, the same month and the same day, but only wish to die in the same year, the same month and the same day. The emperor, the queen, and the land, have learned from this heart, betrayed righteousness and ungratefulness, and killed both heaven and man!" After the oath, ask about your age. Liu Bei is already twenty-eight, Guan Yu is twenty-seven, Zhang Fei is twenty-two, but He Yue is only twenty. So he worshiped Xuande as his elder brother, Guan Yu as the second, Zhang Fei as the second, and He Yue as his younger brother. " Little did they know that in the Taoyuan friendship, there was a person who should not have existed, but that person had traveled through time!