Is the agricultural season accurate in the solar calendar or the lunar calendar?

Twenty-four solar terms were the most accurate in the ancient Central Plains, and Henan was the main solar term. The twenty-four solar terms are not the lunar calendar but the solar calendar, which divides 365 days into twenty-four parts, each of which is about fifteen days. Solar terms first reflect the sunshine intensity, which is strongest in summer solstice and weakest in winter solstice. Solar terms also reflect the climate characteristics, and rain reflects that rain is beginning to increase, so solar terms are used to guide agricultural activities. The proverb of the twenty-four solar terms is based on Henan, because Henan was not called Henan at that time, and it was collectively called the Central Plains. The so-called winning the Central Plains is the political and cultural center where Zhou went. Solar terms should naturally be based on the Central Plains. Twenty-four solar terms should be adapted to local conditions, not mechanically, which is related to latitude. The latitude in the south is low, and sowing and harvesting are earlier than in the north. This is why a large number of harvesters go south in the harvest season and then go north one after another.