How many days are there between the small agent and the big agent?

Slight summer heat: it is mild summer heat when the sun reaches 105 on July 7 or 8 every year. "Twenty-four solar terms": "June Festival" ... It is also hot in summer, and it is small at the beginning of the month, big in the month, and still small today. "Summer heat" means hot, it is a little hot, not very hot. It's getting hotter, but it's not the hottest.

Daxia: The solar term of Daxia is when the sun reaches 120 on July 23rd or 24th every year. "Big Summer", like "Little Summer", is a festival that reflects the degree of summer heat, and "Big Summer" means extremely hot. Twenty-four solar terms: "in mid-June, ... it was hot, small and small, small at the beginning of the month, and big in the month, and it is still hot now."