Mike had the news from People’s Bank of China chief economist Ma Jun in a weekend Q&A here

As usual, the PBOC USD/CNY central reference rate will be set at 9.15am in Beijing (actually a minute or so later is usual), which is 0115GMT.

Its worth reading Mike's post to catch up on the comments ahead of the fixing. It would appear that the enhanced volatility in the yuan last week is likely to settle down a little today. But, with the PBOC, and central bank rate setting activities in general (yeah, I'm lookin' at you SNB) its worth being on guard for anything.