7REN Yang1,LI Yuan-hui1,JIANG Guo-hua2 1.Faculty of Humanities and Social Sciences,Beijing Forestry University,Beijing 100083,China,2.Division of Legal Affairs,Beijing Municipal Bureau of Landscape and Forestry,Beijing 100013,China.Ecological Hidden Troubles and Countermeasures under Reform of Collective Forest Tenure[J].Asian Agricultural Research,2011,3(11):46-49.