The signing of the security agreement between the Solomon Islands and the People’s Republic of China has raised concerns among some countries in the Indo-Pacific region, including Australia, India, Japan, and the United States, which form the Quad group. This article aims to examine the reaction of the format countries to the Honiara-Beijing agreement. The paper contains an analysis of the reasons for the rapprochement between the Solomon Islands and China, presents the reasons for the expansion of the PRC in the security dimension to the Pacific Island countries, and examines the Quad’s reaction to Beijing’s actions in the region.