Photo shows black-necked cranes in Lhundrup County, Lhasa City, southwest China's Tibet Autonomous Region. [China Tibet News/Yao Haiquan]

Photo shows tourists who are taking photos in the Yamdrok Lake scenic spot. [China Tibet News/Lozang]

Tibet is important national ecological security barrier and it is also important gene pool of biodiversity.

By the end of 2016, there are 47 natural reserves in Tibet. Among which, there are 10 national level natural reserves, 13 autonomous regional level natural reserves and 24 city (prefecture, county, district) level natural reserves. The total area of all natural reserves in Tibet is 412200 square kilometers, accounting for 34.35% of Tibet's total area.

Photo shows small villages along the Nyang River. [China Tibet News/Bai Juan]

Photo shows the beautiful scenery of Bomi County, Nyingchi City, southwest China's Tibet Autonomous Region. [China Tibet News/Yao Haiquan]

Photo shows the beautiful scenery of Lulang Forest Sea. [China Tibet News/Tenzin]

Photo shows the shelter forest of Lhasa River. [China Tibet News/Yao Haiquan]

Photo shows the idyllic scenery of Nanggarze County, Lhoka City, southwest China's Tibet Autonomous Region. [China Tibet News/Tenzin]