Ningshan County in NW China makes efforts in ecological protection and green developmentIn pics: autumn scenery across ChinaThailand welcomes 1st Chinese tour groups in 3 yearsFamily garden becomes a hit with international visitorsView of Great Wall in BeijingChina's air passenger trips to reach 9 million during May Day holidayAutumn scenery of imperial Xiaoling Mausoleum in Nanjing, E ChinaExplainer: Why are tourist trains gaining steam in China?Thailand welcomes 1st Chinese tour groups in 3 yearsChina a greener country after decade