2008 Sichuan earthquake
The small village of Sier could only be reached by walking. Landslides were a danger to a search and rescue group of 80 men. Each man carried about  of relief supplies. The village is  above sea level. The extreme mountain conditions meant they could not use helicopters. Over 300 Tibetan villagers were stranded in the ruined village without food and water. Commander Yang Wenyao's rescue group arrived after walking for 5 days, and helped the injured and stranded villagers down the mountain