A view of watchtower-like residential buildings in Gonjo County, Chamdo Prefecture in Southwest China’s Tibet Autonomous Region. Locals in the county’s Sanyan area live in the buildings that are three to five floors high and made of mud on the outside, with each structure home to at least two families. (Photo: China News Service/Ji Xiang)

A view of watchtower-like residential buildings in Gonjo County, Chamdo Prefecture in Southwest China’s Tibet Autonomous Region. Locals in the county’s Sanyan area live in the buildings that are three to five floors high and made of mud on the outside, with each structure home to at least two families. (Photo: China News Service/Ji Xiang)

A view of watchtower-like residential buildings in Gonjo County, Chamdo Prefecture in Southwest China’s Tibet Autonomous Region. Locals in the county’s Sanyan area live in the buildings that are three to five floors high and made of mud on the outside, with each structure home to at least two families. (Photo: China News Service/Ji Xiang)

A view of watchtower-like residential buildings in Gonjo County, Chamdo Prefecture in Southwest China’s Tibet Autonomous Region. Locals in the county’s Sanyan area live in the buildings that are three to five floors high and made of mud on the outside, with each structure home to at least two families. (Photo: China News Service/Ji Xiang)

A view of watchtower-like residential buildings in Gonjo County, Chamdo Prefecture in Southwest China’s Tibet Autonomous Region. Locals in the county’s Sanyan area live in the buildings that are three to five floors high and made of mud on the outside, with each structure home to at least two families. (Photo: China News Service/Ji Xiang)

A view of watchtower-like residential buildings in Gonjo County, Chamdo Prefecture in Southwest China’s Tibet Autonomous Region. Locals in the county’s Sanyan area live in the buildings that are three to five floors high and made of mud on the outside, with each structure home to at least two families. (Photo: China News Service/Ji Xiang)

A view of watchtower-like residential buildings in Gonjo County, Chamdo Prefecture in Southwest China’s Tibet Autonomous Region. Locals in the county’s Sanyan area live in the buildings that are three to five floors high and made of mud on the outside, with each structure home to at least two families. (Photo: China News Service/Ji Xiang)

A view of watchtower-like residential buildings in Gonjo County, Chamdo Prefecture in Southwest China’s Tibet Autonomous Region. Locals in the county’s Sanyan area live in the buildings that are three to five floors high and made of mud on the outside, with each structure home to at least two families. (Photo: China News Service/Ji Xiang)

A view of watchtower-like residential buildings in Gonjo County, Chamdo Prefecture in Southwest China’s Tibet Autonomous Region. Locals in the county’s Sanyan area live in the buildings that are three to five floors high and made of mud on the outside, with each structure home to at least two families. (Photo: China News Service/Ji Xiang)

A view of watchtower-like residential buildings in Gonjo County, Chamdo Prefecture in Southwest China’s Tibet Autonomous Region. Locals in the county’s Sanyan area live in the buildings that are three to five floors high and made of mud on the outside, with each structure home to at least two families. (Photo: China News Service/Ji Xiang)