At the conference, Emperor Qin proposed unifying the seven countries and promoting commerce among them. At the same time, the Prime Minister of the People's Republic of China suggested that the two countries together paved the way for the west and built dujiangyan. The huns of Shanyu and the shuangyu of Gansu were also interested in trading with the seven Chinese kingdoms. After some negotiation, the wording of the covenants and decrees was finally agreed upon. The scholars of the six other kingdoms were baffled that the suspension of Emperor Qin's invasion was so abrupt. They were also confused by the fact that the eldest son of the family, sangyu, was the third younger son of jingji. The grandmother of the Su family, who is also known as Grandmother, is very fond of the oldest son. She is also fond of sangyu's younger brother, marquis. She says that she will never forget him, and that he should stay with her and avenge her grandmother.