Francois's langurs, an endangered monkey species, are seen at the Mayang River National Nature Reserve in Yanhe Tujia Autonomous County, southwest China's Guizhou Province, May 17, 2018. Guizhou, a landlocked province in southwest China, boasts itself with large mountainous areas and hills, which account for 92.5 percent of the province's total. As a pilot zone of national ecological civilization, Guizhou has in recent years been committed to developing itself into a tourist destination of mountain tourism to be known worldwide. Green development has become a name card for Guizhou, which can be manifested in that the province has over the years been ramping up measures in this regard, such as promoting the river chief system and the redline of environmental protection. The province's endeavor to advance ecological growth has yielded fruitful results. Forest coverage now stands at 57 percent. Good air quality days in key and county-level cities took up 97.2 percent and 97.7 percent, respectively. With about 1,100 meters above sea level and an average temperature of 23 degrees Celsius in summer, Guizhou is home to some world natural heritage sites, including the Libo Karst, Shibing Karst, China Danxia and Mount Fanjingshan. Mount Fanjingshan, a natural habitat for more than 7,000 species of wild flora and fauna, is the best-preserved ecological area along the same altitude. The "Guizhou Day" event kicked off Sunday at the Beijing International Horticultural Exhibition. Visitors can tour the Guizhou Garden, a miniature landscape endowed with picturesque scenery and rich cultural heritages. (Xinhua/Yang Wenbin)