By Xu Congjun

On 20 January, drone took photos of the beautiful scene in Nantong city area under the blue sky and white cloud. In 2021 there are 322 class A and B days in Nantong, which account for 88.2% of all the days in the year. It is ranked the first in Jiangsu for the fourth continuous year. The average PM2.5 is 30 mcg/m3, there is a reduction of 11.8%, which made a historical breakthrough.