Shen Yushi was born in 1978, the year when China first adopted its policy of reform and opening up. In China, we have a saying: "四十不惑" (si shi bu huo), which means "when you turn 40 you should be without doubts".

From Beijing to the Silicon Valley, and then back to China’s capital, does this middle-aged tech guru now have a clear picture of his life calling? Shen Yushi sat down with China Plus for an in-depth interview for our series "Deep Dive: Talks with Chinese Internationals".