cctv.com news: On the 11th, reporters learned from the China National Environmental Monitoring Centre that to date, China has already set up more than 5,000 national, provincial, municipal and county level monitoring stations and points; the ambient air quality monitoring network is completed.
央视网消息：记者11日从中国环境监测总站了解到，目前我国已经设置国家、省、市、县四个层级的5000余个监测站点，环境空气质量监测网已经建成。