Regional disparity also exists, with some areas reporting a ratio of 100 to 138, such as southern China's Guangdong and Hainan provinces.
Regional disparity also exists, with some areas reporting a ratio of 100 to 138, such as southern China's Guangdong and Hainan provinces.
男女性别比例也存在着地域性差异，例如中国南方的广东和海南两省的男女比例为138：100。