Northeast China's black soil region is a key grain-producing area, contributing about one-quarter of the nation's total output. Facing challenges of soil thinning, fertility decline, and hardening in recent years, China has introduced no-tillage farming, restoring soil fertility and boosting yields. With emphasis on the protection of black soil during the 15th Five-Year Plan period, this precious land is becoming a solid foundation of China's agricultural strength. CGTN's series Path to Prosperity takes you there.