Actually CNSA releases mission data faster than either ESA or ISRO and CNSA plans are known well in advance. Just because the Euro-American media don't splash them across headlines, does not mean they are not there.
My google-fu must be weak in this specific instance, as I don't have the skinny on CNSA info or announcements Any linkifications would be much appreciated, or is it just a matter of better keywords...
There are people who specialise in monitoring Chinese space, and their twitter feeds are very interesting.
The unmanned spaceflight forum has a lot on the Chang'e missions
http://www.unmannedspaceflight.com/index.php?act=idxamongst others.
Data from previous lunar missions is available in quantity here:
http://moon.bao.ac.cn/index_en.jspbut the site can be unpredictable - sometimes very quick, sometimes painfully slow.
China is very open with its data and announcements, as long as it works, and my take on it is that they like to make sure that everything properly reflects the glorious party of the motherland and its heroic achievements before it goes public. Contrast that with India's lunar program, where a much promised data release from Chandrayaan-2 is now 2 months overdue and despite many requests to anyone who'll listen data that is advertised as available from Chandrayaan-1 stays stubbornly missing from their terrible website.