Shandong J-Blue Technology Co., Ltd. ("Shandong J-Blue") is a holding subsidiary of Duolun Technology, located in the high-tech industry center of Jinan High-tech Zone. Shandong J-Blue is an important part of Duolun's motor vehicle inspection business, specializing in product development and sales including automobile comprehensive performance testing, automobile safety testing, automobile environmental testing, automobile exhaust remote sensing monitoring, automobile exhaust detection and treatment, and air pollutants control and monitoring. The company is certified as a high-tech enterprise with software enterprise identification and software product registration.

Shandong J-Blue has passed the ISO9001 quality system, ISO14001 environmental management system, and OHSAS18001 occupational health and safety management system certification. It has also obtained diesel vehicle exhaust gas treatment patents, OBD/CBD exhaust gas monitoring terminal patents, dozens of software copyrights and software product registration certificates. Among them, the fully automatic testing system for motor vehicles has obtained the safety certification from the Ministry of Public Security. Shandong J-Blue sets innovation as its mission of development and views customer needs as its eternal driving force. It is willing to work with other parties to contribute to the development of China's motor vehicle inspection industry and help preserve green mountains and green waters in China.