http://www.bloomberg.com/apps/news?pid=20601087&sid=afbSjYv3v814&pos=6 "Paulson Says Russia Urged China to Dump Fannie, Freddie Bonds"
Note that the title is a bit misleading: what happened is that Russia told China it was planning to back away from Agency debt, because the US Government hadn't yet implicitly backed Agencies by nationalizing Freddie Mac and Fannie Mae. Russia was just being a good neighbor, i.e. signaling it wasn't going to try to crash the markets, which would've damaged China's holdings. Later in 2008, Russia and China (just anyone else with any financial sense at all) began to diversify out of Agencies into safer T-bills, but at a slow and measured pace.
-- DRR