Cummins is headquartered in Columbus, Indiana, USA. Cummins has 550 distribution agencies in more than 160 countries that invested more than 140 million dollars in China. As the biggest foreign investor in Chinese engine industry, there are 8 joint ventures and wholly-owned manufacturing enterprises in China. DCEC produces B, C and l series diesel generators while CCEC produces M, N and K series diesel generators. The products meet the standards of ISO 3046, ISO 4001, ISO 8525, IEC 34-1, GB 1105, GB / T 2820, CSH 22-2, VDE 0530 and YD / T 502-2000 “Requirements of diesel generator sets for telecommunications”.