Water-retaining agents utilize super absorbent resins, which are highly functional polymers with exceptional water absorption capabilities. They are non-toxic and harmless, capable of repeatedly releasing and absorbing water, hence likened to "micro-reservoirs" in agriculture. Additionally, they can absorb fertilizers and pesticides and release them slowly, enhancing the effectiveness of both. Super absorbent resins are widely used in agriculture, forestry, horticulture, building materials; in industry, they are extensively applied in petrochemicals, cables, papermaking, sensors, fire extinguishers, fiber products, cosmetics, food preservation, and expandable toys.