When earth moved, this teen didn't flinch

Yi Junhao felt his stool wiggle on the sixth floor of a residential building in Chengdu, Sichuan province, when a magnitude-7.0 earthquake was triggered 285 kilometers away in the Jiuzhaigou county.

But the 15-year-old junior high school student didn't panic: He had experienced three major earthquakes in his home province in less than a decade - the magnitude-8.0 Wenchuan earthquake in 2008, the magnitude-7.0 Lushan earthquake in 2013 and the magnitude-6.3 Kangding earthquake in 2014.

"I've been hardened by all the quakes," he said.