What grade does the extremely cold weather in Gansu belong to?

"Extreme cold" is an extreme temperature concept. According to Shanxi Evening News, there is a white "Cold Degree Scale" for meteorological majors, which divides the cold into eight grades:

The first level is extremely cold, and the temperature is below -40℃.

The second level is extremely cold, ranging from -30℃ to -39.9℃.

The third level is "severe cold", ranging from -20℃ to -29.9℃.

The fourth grade is "severe cold", ranging from-10℃ to-19.9℃.

The fifth grade is "slight cold", ranging from -5℃ to -9.9℃.

The sixth grade is "light cold", ranging from 0℃ to -4.9℃.

Grade 7 is "slight cold", ranging from 0℃ to 4.9℃.

Grade 8 is "cool", ranging from 5℃ to 9.9℃.

It can be seen that extreme cold is the coldest level in the "cold degree scale".

Sun Leng, a senior engineer in the Climate Monitoring Office of the National Climate Center, explained in an interview with China Meteorological News: Generally speaking, whether an area can have extremely cold weather is greatly influenced by latitude, and extremely cold weather can only occur in high latitudes. But if we analyze the data carefully, some careful people may find that the latitudes of Tibet and Qinghai are lower than those of Gansu.

However, there have been extremely cold weather in these two areas, while there has been no extremely cold weather in Gansu. In this regard, Sun Leng explained that the occurrence of extremely cold weather is also affected by land and sea location, ocean currents, topography, landforms, altitude, underlying surface properties, seasons, weather conditions and human activities.

People's Network-Cold is also graded to see what is the extremely cold weather of "frozen chin"