Fujian Longking Co., Ltd. (hereinafter referred to as "Longking") in Yango owned by Yango is the leading enterprise of China's environmental protection industry. For more than 40 years of commitment to professional research, development, design, manufacturing, installation, commissioning, and operation, it forms five series of products including dust abatement, desulphurization, denitration, material delivery, and electronic control device, with application in the field of electrical power, metallurgy, building materials and others. Its product technology has reached international advanced level, part of which has reached the internationally leading level. Volumes of production and sales rank the first among its peer companies same for more than ten consecutive years. The products are sold to all over China, and exported to Japan, South Korea, Turkey, Brazil, India, and other more than forty countries and regions.