Magnitude-7 earthquake in Tibet kills at least 16

A magnitude-7 earthquake in the northern Tibetan city of Nagqu has killed at least 16 people, injured 54 and collapsed at least 339 homes, official media said, in what China's CCTV called the region's biggest quake in five years. The Guardian

the GuardianMagnitude-7 earthquake hits Tibet, killing at least 16 and destroying hundreds of homesSearch and rescue efforts under way after quake strikes region’s north, with at least seven aftershocks recorded

What makes rescue and rebuilding hardest in a high, remote region like Nagqu?