Buddy; Don't always look at things with a supicious mindset;
Sometimes the reason could be as simple as gold hold value.
Or may be you can read whats the article below say.
Why China wants to buy $93 billion worth of gold | 01 March 2009 | www.commodityonline.com
Concerning your next question; is it that difficult to do a little google ?
it is hard to digest tht u are chinese.......specially after reading ur reply.