On-chain fund flows are increasingly the focus of global regulation. Terrorist financing often involves small transactions split and aggregated through multiple channels such as exchanges, cross-chain bridges, and payment platforms. This pattern poses real challenges to the compliance systems of the entire industry. As geopolitical conflicts escalate, international sanctions are being rapidly reflected at the blockchain level, which means relevant institutions must update their defenses — not only improving customer identity verification but also enhancing the depth and accuracy of fund tracing. Simple passive defense is no longer sufficient; proactive risk control systems have become an essential task of the moment.