case studies issues of urban community conflict in northeast China case studies on issues of urban conmunity conflict in northeast China 社区冲突与社区建设：东北城市社区矛盾问题案例研究：case studies issues of urban community conflict in northeast China 社区冲突与社区建设：东北城市社区矛盾问题案例研究：case studies on issues of urban conmunity conflict in northeast China Study on society of rural community in modern northeast China 并列题名：Study on society of rural community in modern northeast China postitive study on urban community building in china