This Telegraph acticle has much more solid, useful divorce rates for China than the non-standard and easily misunderstood ones that have been circulating in the press lately. It uses annual divorces per capita, which does not tell you much that you can intuitively relate to everyday life, but it's the standard measure for comparisons with different times and places. The latest US rate, which like the one below is for 2009, is 3.6 per thousand.
"China's divorce rate has more than quadrupled since economic opening up began in earnest in 1985 – from 0.4 per 1,000 people to 1.85 per 1,000 people in 2009 – but still compares favourably to Britain's 2.8 divorces per 1,000 population, the highest rate in the EU."
"Divorce-rates in Beijing ... have nearly doubled since 2004 from 11,582 in 2004 to 21,013 last year."