Peace is never abstract—it stands on the edge of life and death.

In southern Lebanon, the 120-kilometer "Blue Line" is still scarred by landmines and unexploded ordnance. Chinese peacekeepers from the Multi-Role Engineering Unit describe their demining work as "dancing on the tip of the knife." This episode also recalls July 2006, when Chinese Major Du Zhaoyu and three other UN observers were killed on duty.

"Blue Helmets, No Borders" is a groundbreaking CGTN documentary featuring the courage, commitment, compassion and connection of UN peacekeepers, who strive to safeguard peace, even when it means the ultimate sacrifice.