Tieling Laokang Fertilizer Co., Ltd. is located in the “larger city Tieling”. It is a modern compound fertilizer production enterprise integrating science, industry, trade and service. The company was founded in 1991 and covers an area of 100,000 square meters. Design and production of "Kangzhuang Avenue" brand, "Lao Kang" brand, "Xie worry" brand series of fertilizer 200,000 tons. The company conducts soil testing for farmers in the spring and autumn of each year free of charge. According to crop growth and fertilizer requirements, soil fertility performance and fertilizer effect, the soil fertility formula is determined by the principle of balanced fertilization. In 2003, the company passed the ISO international quality system certification; in 2004, it introduced the soil measuring instrument and measured the soil for farmers free of charge; in 2005, it was named as the famous trademark of Liaoning Province; in 2006, it was awarded the famous brand product of Liaoning Province, and the soil testing formula of Liaoning Province was fixed. Production enterprise; in 2007, it was rated as a famous brand in China; in 2012, it was granted a patent for "controlled release fertilizer".