Riyanjike Co., Ltd. has inherited the spirit of the "Science and Chemical Research Institute" of Japanese science. As a manufacturer of instruments related to disaster prevention, it has achieved good results every year. In semiconductors, petroleum enterprises, etc., we can independently develop gas sensors suitable for different industrial characteristics. It has been more than 80 years since we started our business in 1939. We use scientific methods to create safety and continue to work hard to create a safe working environment. . Among the detection gases, the company has developed a detection instrument for gases with strong toxicity, one-millionth concentrations that can make people deadly. With such accuracy, subtle deviations cannot be allowed. It also needs to be able to monitor in real time and maintain high performance for safety. He has a high technical level and service awareness in research and development, design, production, sales, etc., so the quality of the research institute has always been trusted. The company has the responsibility to face the various new requirements put forward by the society, so the company has invested tremendous efforts in R&D to contribute to "creating a safe working environment for people."

Liyan Machinery Trading (Shanghai) Co., Ltd. (hereinafter referred to as Liyan Trade ) was established in 2009. It is a wholly owned company of Riyanji Machinery Co., Ltd. in China. Mainly engaged in the sales and after-sales service of gas detectors and gas alarms produced by Japan Riyoko Co., Ltd. in China. The products involve petrochemical, gas, natural gas, metallurgy, shipbuilding, semiconductor, liquid crystal, solar energy, fuel cells and other industries. The establishment and operation of Riyan China enable Riyan products to enter the rapidly developing Chinese industrial production safety equipment and equipment market more directly and quickly. At the same time, it provides more convenient and faster services and new product information to many multinational companies in China who have used Riyan meter products.