Billionaire business magnate Bill Gates shakes hands with Justin Yifu Lin, a professor at the National School of Development at Peking University, after giving a speech at the Beijing campus on March 24, 2017. The Microsoft founder's speech was on Looking to the Future: Innovation, Philanthropy and Global Leadership. He said China plays an irreplaceable part in global affairs, and the younger generations of China shoulder the mission of promoting development and progress around the world. [Photo by Zhu Xingxin/chinadaily.com.cn]