The mass protest lead by white-collar communities against the Ximen Para xylene chemical factory project （PX）in 2007 marks a new watershed of environmental civil protest movement in China.However，a sharp rising curve of such crisis events nation-wide after seven years is still crying for sustainable solutions.The governmental predominate abatement measures vividly captured by medias as “the more aggressive the protests by the to-be-affected communities，the larger the compromises by the local government and business owner”.In other words，local government and investors typically would follow the same strategy to either cancel or postpone indefinitely the concerned project.But this reactive strategy hardly has resolved the issues of confidence and collaboration from the pubic and there is little lessons learned in new decision making of similar project.The conflicts management studies categorize the nature of environment conflicts as non-constitutional or distributional in financial gains and losses.This is somewhat comparable to the Chinese think-tanks’ characterization of environmental mass protests as internal conflicts of the people，therefore it implies that the mass protests of environmental conflicts are typically not motived by anti-government political ideologies，rather it should be only be approached by laws of economic arrangement.This article documents and analyses NGOs’ first experience intervening the environmental mass protests against petro-chemical projects in China.In the second half of 2013 for the first time，the coalition of the four Chinese NGOs and core volunteer citizens through research，reviews and retrospective interventions in the decision making and public hearing of the environmental impact assessment of the An Ning 10 million tons/year of Petrochemical Refinery Project in the suburban county，west of Kunming Municipality，aim at making valuable contribution to the sustainable solutions to the environmental mass protests and crises，meanwhile，making an action-based assertion about the indispensible roles and function of civil society organizations in addressing and prevention of the environmental conflicts and crises in China.