【正确答案】The 24 solar terms is a general name of the system that consists of 12 major solar terms and 12 minor solar terms linked with each other. It reflects the climate change, guides agriculture arrangements and also affects people's life. In the Spring and Autumn Period and the Warring States Period, people began to use solar terms as the supplementary calendar. It was in 104 BC that the 24 solar terms was finally set down. As we all know, China is a country with a long history of agriculture. Agricultural production is largely influenced by the laws of nature. In ancient times, peasants arranged their agricultural activities according to the move of the sun. It is the fact that the 24 solar terms takes account of the position of the sun that makes us attach importance to it.