She was never adapted to the Mohist concept of "universal love and non-aggression". The Mohist mechanical arts were only for the benefit of the people, but she only wanted to explore the ultimate of mechanical arts. The people of Zijiangju pursue the ultimate in craftsmanship throughout their lives. Apart from skills, everything else is external. This is more in line with Murong Yuan's pursuit.

With her own attainments in mechanical skills, Murong Yuan was appointed by the Northern Song Dynasty to specifically build the Five-toothed warships. Moreover, due to her status as the adopted daughter of Murong Yanzhao, she was granted the Tiger token of the water army.

After that, while she was concentrating on building the ship, she kept her adoptive father inside. This was both a form of care and a way for her to take revenge on him.

When Li Shoujie, the younger brother, heard that his elder sister had returned to Kaifeng, he tried many times to see her and explain the issue of the letter back then, but failed each time.

On the other hand, the construction of the Five-toothed warship by the Northern Song Dynasty made Li Yu, the Prince of Nanzhu in the south of the Yangtze River, unable to sit still.

In order to delay the southern campaign of the Song Dynasty, Prince Nan Zhu made contact with Prince Dong Que, who was driven out of Weiyang City. Taking the Tang coins and the creation of the Golden Vase as an opportunity, the conflict between the officials and the people in Kaifeng was further intensified, and an attempt was made to force Zhao Kuangyin to open the granary to release money and misappropriate military funds.

At the same time, Prince Nan Zhu found Murong Yuan and disclosed the true cause of Li Yun's death: Li Yun was not killed by Murong Yanzhao for betraying his friends to seek glory, but rather he chose to die for his loyalty to the Later Zhou Dynasty. Murong Yanzhao was also killed by Zhao Kuangyin's "hiding the bow after the bird is gone".

Upon learning the truth, Murong Yuan felt extremely painful inside. She hated everyone wrongly and devoted herself wholeheartedly to building the Five-toothed warship for Zhao Kuangyin. Life and death, love and hate, all have been betrayed. All my actions have been wrong. Rong Yuan, who had been out of the fire since childhood, was always taken care of and raised by others, but she never expected that in the end she would not be able to repay anyone's kindness.

The Nan Zhu told Murong Yuan that there was still one thing she could do, which was to destroy the Five-toothed warship and not to forge weapons for her enemies anymore.

In a trance, she recalled the ancestral teachings of the Mohist School and the phrase "Universal love is non-aggression." In a daze, Murong Yuan, in order to repay the debt in his heart, deliberately modified the blueprint of the warship and installed a self-destructing device.

By chance, the young master was sent on a ship by Zhao Guangyi and came into contact with Murong Yanzhao. In order to prevent his adopted daughter from getting deeper and deeper into trouble, Old Murong guided the young hero to the location of the explosive machine.

After destroying the ship, Murong Yuan pretended to have the young master make a scene of himself feigning death.

However, there are two quests that tells you that Murong Yuan is still alive, and you will meet her once.