천왕
In 357, after finding out that Fu Sheng was ready to kill him and his brother Fu Fa (苻法) the Prince of Qinghe, Fu Jiān acted preemptively, overthrowing and killing Fu Sheng. He assumed the throne under the title "Heavenly Prince" ("Tian Wang"), and he made Wang one of his key advisors, along with his brothers Fu Fa and Fu Rong, his son Fu Pi, and his mother Empress Dowager Gou's lover Li Wei (李威).