The Ministry of Ecology and Environment on March 28 released findings on the national ambient air quality for the month of February and the period of January to February.

In February, among the 168 key cities in China, 20 cities – including Lhasa, Haikou and Guiyang – reportedly had relatively good air quality.

Of these, Guiyang – capital city of Southwest China's Guizhou province – ranked 12th.

In the period of January to February, of the 168 key cities, 20 cities had relatively good air quality, of which Guiyang ranked seventh.