This article is aimed to explain and analyze the advocacy process to stop the practice of gendercide in People’s Republic of China. Gendercide has long history in human civilization, this happened in several other countries, one of them is People’s Republic of China. The practice of gendercide in People’s Republic of China was getting worse with the implementation of One-Child Policy. It caused high number of abortion and most of the abort infants are female. Because of that, the issue of gendercide in People’s Republic of China need to be advocated. To analyze the advocacy process in this issue, the writer uses Boomerang Pattern as a tool of analysis and most of the data comes from the secondary data using library research method. This research found out that the advocacy process is: 1) The local NGOs who face restriction from Chinese government build network with INGOs; 2) The INGOs cooperate to advocate the issue in international level and push United States, United Nations, and European Parliament to condemn Chinese government. As the result, the advocacy process above could reduce the number of gendercide victim and also influence the decision making of Chinese government