Colin (Zheng) Huang, 38, started working for Google as an engineer in 2004.

He stayed with the search giant for three years, and has described his time there as “incredibly valuable.”

“Google gave me far more than I contributed,” Huang has written on his personal blog.

Fast forward to present day, and the one-time Silicon Valley newbie is now one of China’s richest people, amassing a fortune worth $13.8 billion with the U.S. trading debut of his e-commerce company, Pinduoduo, on Thursday.

That sum makes him China’s 12th wealthiest individual, according to Bloomberg. Forbes, meanwhile, ranks him the nation’s 13th richest person. Worldwide, he’s one of the 100 richest people, according to the Bloomberg Billionaires Index.

Shanghai-based PDD, as the company is known, listed on Nasdaq with the stock closing at $26.70 and rising as much as 44% on its first day of trading on New York’s second biggest stock exchange. The…