Great Technology Co., Ltd. (stock code is 835211) is located in Langfang City which is well known as the corridor between Beijing and Tianjin. The hi-tech enterprise engages in the production, research and development of advanced oil field chemicals, and provides total solutions and technical service for cementing, stimulation, oil-gas gathering and transportation, as well as the drilling and completion fluid. Up to now, we have more than 10invention patents. Our products and service have not only been widely and successfully used in domestic oil fields, and are also exported to foreign countries, such as USA., Colombia, Indonesia, Kazakhstan, etc.