This book examines China–Indonesia relations in 2025, marking 75 years of diplomatic ties amid heightened geopolitical uncertainty. Cooperation across trade, investment, infrastructure, technology—including artificial intelligence (AI)—and defense expanded, even as Indonesia faced challenges in governance and strategic positioning. Indonesia joining BRICS and US tariffs set the tone for the year, shaping expectations around Global South engagement, trade realignment, and access to development and climate finance. Economic cooperation in downstream minerals, nickel, manufacturing, energy, digital technologies, and AI progressed amid regulatory pressures, while high-level diplomacy, defense diversification—including Chinese J-10C fighter jets—and the ongoing negotiations over the Jakarta–Bandung high-speed rail reflected both progress and governance challenges. Following the format of previous editions, this volume compiles our analyses in leading international outlets, offering a concise assessment of the opportunities and complexities shaping China–Indonesia relations ahead.