Mr Guo holds a degree in Law, and is a member of the Bar, in China.
He is the manager of the investment and development department of Shenghe, focusing on selecting, evaluation and acquisition of rare earth projects.
Ms Wenting Chen, the previous nominee director of Shenghe, has stepped down from the role due to her other growing commitments.
Tony Ho, chairman, commented: "On behalf of my fellow directors, I welcome Mr Xiaolei Guo to the board and thank Wenting Chen for her valuable contributions during her time on the board.
"We wish her well in her future endeavours.
"Mr. Guo’s international capital markets and rare earth industry expertise will be of significant value to the board as we move ahead with the future development of the Kvanefjeld Project."
Last year Shenghe entered a strategic cooperation agreement with Greenland Minerals and become their largest shareholder.