4. According to Shi Kefeng's information query, there are 4 brands of Shi Kefeng compound fertilizer, namely Shi Kefeng, Saiyang, etc. Shi Kefeng Chemical Co., Ltd. is affiliated to Shandong Xianglong Industrial Group Co., Ltd. It is a high-tech backbone compound fertilizer enterprise integrating scientific research, production, sales and agrochemical services.