Beijing Kelinruier Technology Co., Ltd.
Kelin Energy Technology International DMCC
Hainan Kelinruier Technology Co., Ltd.
Shandong Kelinruier New Material Technology Co,. Ltd.
Shandong Kelinruier Pipeline Engineering Co,. Ltd. Tianjin Branch
Shandong Kelinruier Pipeline Engineering Co,. Ltd. Iraq Branch

Hainan Kelin Huixin Investment Center