What does the solar mouse symbolize?

On July 7th or 8th of every year in Gregorian calendar, when the sun reaches 105, it is considered as a slight summer heat. Summer heat, which means hot, is a little hot, not very hot. It means that the weather is getting hotter, but it is not the hottest, and most parts of the country are basically in line with it. Crops all over the country have entered a vigorous growth period, and it is necessary to strengthen field management.

In other words, the weather began to get hot.