中国第二大内流河，原地复活了？

Core Viewpoint - The Heihe River, China's second-largest inland river, has seen its length increase from over 500 kilometers to nearly 1000 kilometers over the past 20 years, highlighting significant environmental recovery efforts [1] Group 1: River Characteristics - The Heihe River is located across the Qinghai, Gansu, and Inner Mongolia provinces, serving as a crucial water source for millions of people [1] - The river faced severe challenges, including periods of complete drying up in its lower reaches, indicating a critical environmental situation [1] Group 2: Recovery Efforts - The revival of the Heihe River over the past two decades has been attributed to substantial water resource management and various afforestation and desertification control projects, including the "Green Belt Action" initiative [1] - The combination of sufficient water supply and community-driven environmental projects has played a vital role in the river's restoration [1]