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