A cold spell in later spring brought gorgeous sunset glow

　　On March 4th, A fairly strong cold wave hit the city of springs, bringing strong cold weather, the lowest temperature was reduced to -9℃. Level-3 to level-4 north winds took away the pollutants in the air, the air quality index was 48 at 5p.m., and the air quality was excellent. When the sun went down, the sky was dressed up with gorgeous sunset glow, half of the sky was in red color.