Actually, except for semi-final and final, there's no need to buy the tickets in advance.;-) The stadium has a ticket office which is on the right, near an entrance.(I can't remember which entrance clearly, sorry) You can buy the tickets just before the matches begin. Hope this will do some help.
http://2010cbmcz.cba.org.cn/zl/2010-08-02/314748.html you could refer to this website 0086-0519-89850909 this is telephone number you could book ticket through price for final day 680rmbVIP500rmb一等票(first)380rmb二等票(second)200rmb三等票(third)