Zongqian Wangrun owns ChinaRank, which is the only internet company that has permission to publish website rankings in China.
The new venture will be called CR-Nielsen and will be the first company authorised to support the delivery of standardised internet measurement services in China.
To mark its launch, CR-Nielsen released initial findings on traffic to the biggest websites in China. It revealed that Google trails far behind leading Chinese search engine , which had 171m users in the first two weeks of September, compared with 81m using Google in the same period.
Itzhak Fisher, executive chairman of Nielsen Online, said: "With more than 250 million internet users, China represents a significant opportunity for our clients, and there has been a loud call to support this expanding market with high-quality, independent online measurement services."