I saw a figure recently on dairy exports to China, which were up considerably. However, I have no idea whether or not that figure constitutes all the dairy exports to China or just one country.
Our dairy exports to China January - July increased 48%. Of course, even the USA is not too concerned about the accuracy of exports (no duty to collect).
But, here is what you get looking at official sites in China: http://www.chinacustomsstat.com/
Good luck. I can tell you the data is only through April. I'll keep working on it though. I am very curious what percent of the dairy imported into China comes from the U.S.