The only source I could find was something from Pravda that didn't cite to any studies. They merely said that there is 120,000 people learning russian and 60,000 adults that understand it in China.
Meanwhile . . .
http://en.wikipedia.org/wiki/Languages_of_China
It is also considered increasingly prestigious and useful to have some ability in English, which is a required subject for persons attending university. During the 1950s and 1960s, Russian had some social status among elites in mainland China as the international language of socialism. Japanese is the second most-studied foreign language in China.[citation needed] However, languages other than English are now considered as "minor languages" (小语种 ; Traditional Chinese:小語種 xiǎo yǔzhǒng) and are only really studied at university level apart from some special schools which are called Foreign Language Schools in some well-developed cities.
English is taught in the public schools starting in the third year of primary school.[1][2]
The Economist, issue April 12, 2006, reported that up to one fifth of the population is learning English. Gordon Brown, the former British Prime Minister, estimated that the total English-speaking population in China will outnumber the native speakers in the rest of the world in two decades.[8]
Then there is…
http://en.wikipedia.org/wiki/List_of_countries_by_English-speaking_population
and citing this journal article from Cambridge . . .
China’s huge English-knowing population of 200–350 million is often cited as evidence of the language being nativized in the world’s most populous country. We may note, however, that the words user and learner are used interchangeably in reference to its speakers of English. When however the focus is on the nativization of English in China, a country in Kachru’s ‘Expanding Circle’ of Englishes, it is imperative to distinguish between users and learners of the language. . .
So no, he can't give you a source on that because it is completely made up.