Fannie Mae, May 31 / PRNewswire-FirstCall-Asianet /-- 03990.HK issued an announcement on the Hong Kong Stock Exchange that the contract sales of the Group together with its joint ventures and associates in the first five months of this year were about 35.46 billion yuan, an increase of 11.09 percent over the same period last year; the corresponding sold floor area is about 2.749 million square meters.