Ji’nan makes the biggest improvement on PM10 in the whole province.

　　The air quality has improved year on year in the whole province in May , data from Shandong Environment Protecting Agency . 24.9 days of “blue sky and twinkling stars” on average , the growth of 0.7 day year on year. 0.3 day of heavy-polluted , the growth of 0.3 day year on year. The composite index of air and environment quality is on average 5.89 , the improvement of 7.7% year on year.