| With the deepening of the process of reform and opening up and the continuous improvement of the level of modernization,serious population problems such as fewer children and aging have emerged in all countries in the world,especially in the developed countries.The formulation and adjustment of the corresponding fertility policy has also become an urgent problem to be solved.Family planning policy has been implemented in China for more than 70 years.After several rounds of adjustment and changes,it has achieved the original intention of restraining the excessive growth of population,However,it has also caused a series of negative effects,it has also caused a series of negative effects,such as sharp reduction of labor force,imbalance of gender ratio,low fertility will of the people,and frequent social problems related to the one-child.Population problems and fertility isuues stint the sustainable development and the creation of an affluent community omni-directional,and are more related to the welfare of the citizen.In the past decade,the government has repeatedly trimmed the fertility policy from one-child policy to single two child policy,comprehensive two child policy and comprehensive three child policy.How do these changes promote?Who is behind the change?How to make,execute and vicissitude a public policy has always been a fundamental problem in the field of public policy research area.Around this problem,the academic circles have carried out continuous and extensive investigation and exploration.However,owing to the complexity of public policy,even the stage theory,which has experienced a long-term application test,is still questioned.Therefore,the formation of policy advocacy alliance is in line with the new public policy environment,characterized by the practice of political democracy,the daily participation of the public,the complexity of economic development,the diversification of policy objectives,and the heterogeneity of social structure.Based on the theory of policy advocacy alliance and Chen Zhaowang’s "fortress" policy advocacy alliance framework theory,this paper focuses on the behavior,interaction and learning of each alliance and participant in the policy process,and finally promotes the process of policy change.And from the analysis of the process of the change of China’s family planning policy and the logic behind the process,reflect on why China’s public policy to achieve change is difficult,as the fortress of the general solid policy needs not only strong external events ignited,but also the efforts of all policy participants within the subsystem.Finally,in view of the obstacles and shackles found,this paper proposes to deepen the policy democracy,change the ruling idea to improve the policy environment,optimize the relevant supporting policies and public services to solve the problem of public policy flexibility,and make some efforts to enrich this new research theory. |