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A global leader in optical fiber communication (light - fiber - optic cable and optical devices - marine optical network and optical network) and quantum communication in the whole industry chain and independent core technology, optical fiber optical networks, quantum communication, ocean observation network and intelligent system solutions and marine engineering design - Construction - operation and maintenance services for the integration of Engineering EPC turnkey service, is the largest field scale Chinese fiber optic network system integrators and network service providers, one of the world's top 3 optical fiber communication industry.