1. Jiangsu Hengtong Ocean Optical Network System Co., Ltd.: Located at No.8 Tongda Road, Changshu City, Suzhou City, Jiangsu Province, the company has domestic submarine optical fiber repair technology.
2. Wuhan University of Technology Optical Co., Ltd.: Located at No.23, University Garden Road, Jiangxia District, Wuhan City, Hubei Province, the company has domestic submarine optical fiber repair technology.