Definition
The Argun River marks a natural border between Russia and China. It's a winding waterway, crucial for regional ecology and boundary demarcation. Think of it like a geographical 'line in the sand' between two major countries. It supports diverse ecosystems and plays a role in local economies. Unlike an artificial border, it's ever-changing. Its flow shapes the landscape and affects both sides. Its significance extends beyond just being a river; it's a geopolitical marker.