After which solar term, it will not be hot.

It won't be hot after beginning of autumn.

Beginning of autumn is the first solar term in autumn. On the calendar, we can also see that beginning of autumn time in 222 is on August 7th, and beginning of autumn is the13rd of the 24 solar terms. However, although beginning of autumn means that the hot summer is coming to an end, it is still very hot after beginning of autumn. Traditional Chinese medicine calls the period from beginning of autumn to the autumnal equinox a long summer (the autumnal equinox is the first16th solar term in 24 solar terms, and the autumnal equinox is on September 23rd, 222), and beginning of autumn is still in dog days.

People divide beginning of autumn into male autumn and female autumn. If it is public autumn, it will be cool after beginning of autumn. If it is mother Qiu, it will still be very hot after beginning of autumn, and autumn tigers may appear. The lunar calendar time in beginning of autumn is odd, so it is a public autumn, and vice versa. 222 years belongs to the mother autumn.