Systematic Thought in Ancient China —— Agricultural Thought in Natural Law

China's ancient systematic thought is also reflected in the practice of agricultural production. Through practice, people gradually realize that agriculture and the surrounding environment are interdependent and mutually restrictive. In the summer and The Book of Songs in July, crops are combined with phenological and astronomical factors such as seeds, topography, soil, moisture, fertilizer, season, climate, etc., and the laws of agricultural activities are studied from an interrelated overall point of view. For example, we can master the laws of celestial movement and seasonal changes through astronomical observation, and formulate calendars and 24 solar terms to guide agricultural activities.