"SHANGHAI/BEIJING (Reuters) - China revealed on Friday that it had secretly raised its gold reserves by three-quarters since 2003, increasing its holdings to 1,054 tons and confirming years of speculation it had been buying."

I have noticed that when an official of the chinese government makes a statement of plan or policy then that action is already in place and often partly accomplished.
There have been tongue in cheek comments from chinese officials regarding gold for at least two years so there was no secret. It is only perceived as secret by western media.