No, this is not a joke, Ziyi signed to play in her first television series. The show 帝凰业 has already started filming in China with Zhou Yiwei, the winner of The Birth of a Actor, as the main male character. It is rumoured to have Yao Xiaofang as the director and Hou Yong for the cinematography.
Stay tuned for more information! You can already enjoy the page dedicated to the TV show.