We have collected 514 coal samples from approximately 40% of the world's premium production regions, covering Asia, Europe, North America, and Oceania. Our standards for humic acid raw materials are exceptionally high—we globally source lignite ore rich in six high-activity functional groups (quinone, carboxyl, hydroxyl, phosphate, amine, and methoxy). Global mineral sources that meet these standards are extremely scarce. Whenever such sources are identified, we secure them through exclusive global purchase agreements.

The quality of humic acid varies significantly across lignite from different regions. We conducted humic acid extraction from various coal samples and analyzed multiple indicators such as molecular weight, functional groups, and infrared spectroscopy. Through bioassay screening, we identified 27 high-quality coal samples. To enhance the efficacy of humic acid, we performed targeted modification and ultimately selected a specific type of lignite. The humic acid extracted from it is rich in functional groups, has a small molecular weight, high activity, and is easily absorbed. It effectively enhances root and plant vitality, improves stress resistance, ameliorates soil quality, and increases fertilizer utilization efficiency.