Zhu Rong was an Isu of the East. He was the master-smith of the eastern Isu.
At some point during the War of Unification, Hephaestus created the Sword of Eden #2 to bring an end to the conflict. Purportedly, after the war, the Isu dispersed the swords to five different corners of the world (East Asia, West Asia, Southeast Asia, West Europe, North Africa) for safekeeping purposes. Fu Xi was trusted to guard this.
Like their Western counterpart, the Hua Xu were excellent craftsmen. Zhu Rong had the ability to bring anything to life – which Fu Xi utilized to bring the Asian humans, which he made of clay, to life.