On May 19, 2023, Tian Hua, general manager of China Coal Technology and Enineering Group Shanghai Company (hereinafter referred to as CCTEG), and his entourage visited Cumark for inspection, visit and exchange work. Cumark Chairman Li Ruichang, Deputy Managing Director Liu Junqiang, Director Chief Engineer Luo Ziyong and others received and discussed and exchanged.

CCTEG is a central enterprise supervised by the State-owned Assets Supervision and Administration Commission of the State Council, is the national team and vanguard of scientific and technological innovation in China's coal industry, has a scientific and technological innovation system covering all professional fields of the coal industry, is committed to the safe, green and intelligent development of coal and clean, efficient and low-carbon utilization, and shoulders the glorious mission of leading the progress of coal science and technology.

Cumark is a leading domestic enterprise in the field of explosion-proof high-voltage frequency conversion technology, has twice won the field of "China Coal Industry Science and Technology Award First Prize", Cumark is one of the few domestic enterprises with explosion-proof high-voltage VFD, a full range of high-voltage VFD, medium and low-voltage VFD R&D, production and manufacturing capabilities, while mastering the most advanced rare earth-free high-efficiency synchronous reluctance motor vector control technology.

Chairman Li Ruichang extended a warm welcome to the leaders of CCTEG , and introduced the history of Cumark's establishment and main achievements. He said that he hopes to effectively combine Cumark's professional and international level green and efficient intelligent inverter motor drive technology with the mining and transportation of CCTEG to jointly promote the digital construction and industrial upgrading of China's coal industry.

Afterwards, the two sides visited the Cumark showroom and observed Cumark's series of products, witnessing Cumark's honor and achievements.

At the end of the trip, the leaders went to Cumark's R&D testing laboratory and front-line production workshop to experience Cumark's professional, standardized and advanced R&D testing and production management.

Tian Hua, general manager of China Coal Technology and Enineering Shanghai Company, spoke highly of Cumark's technology, products and management, and hoped that the two sides could complement each other's advantages, join forces and create a new situation of cooperation.