Photo shows part of the scenery of the tree planting experimental base in Nagqu. [China Tibet News/Losang]

Local herdsmen of Nagqu are working at the experimental base. [China Tibet News/Losang]

In recent years, a series of trial tree planting work in alpine-cold regions has been carried out in Nagqu. With an investment of 17 million yuan, the tree planting experimental and demonstration base is built. 11 kinds of rare trees such as pinus sylvestris, ulmus pumila, Tibetan populus szechuanica and so on are planted.