Jiang Ziya has a way to come back to life. Why can't he save Gambi?

Destiny, Shang Zhou should be destroyed, than dry can only die, can't surrender; At that time, the soup was extinguished and the Zhou room was in full swing. Although there is no way in Shang and Zhou Dynasties, with the assistance of many Chinese and Korean sages, such as Lily, Bigan and Mei Bo, the prosperity of Tang Kingdom will certainly be continued. There are two main tasks in the Romance of the Gods: to cut the Zhou Dynasty and to worship the gods by Jiang Ziya, both of which need to be eliminated by the Tang Dynasty. As a minister of the Tang Dynasty, he was the uncle of Shang Zhou, so Bigan could not surrender and had to die.