About CHEN Yanyan
About データ分析の理論と応用
About agricultural policy
About consciousness
About natural environment
About the northern parts of China
About investigation
About preparation(servicing)
About life style
About waste treatment
About market economy
About rule
About infrastructure improvement
About environmental awareness
About Shandong province
About Social Norms
About social survey
About aqueous environment
About Agricultural economy,agricultural management
About Environmental problems
About 中国
About 農村
About 自然環境
About 現地
About 視察
About リポート