China has introduced several initiatives aimed at further strengthening its influence both regionally and globally. As a complement to the Belt and Road Initiative, the Chinese government also launched the trio of Global Development Initiative, Global Security Initiative, and Global Civilization Initiative. The Global Security Initiative (GSI) has received widespread attention regarding its meaning, strategy, objectives, and implications for China’s role in international security and peace. By looking at this issue from the current dynamics of global security, this study invites us to understand what the GSI is and the goals that China wants to achieve with it, especially in Southeast Asia. The implications of the GSI for the region’s economic development and stability are also highlighted. China intends the GSI to act as a “broker” for achieving world peace, with strategic consequences for the stability of the Southeast Asian region.