Core Viewpoint - The article emphasizes the importance of marine communication networks in supporting the development of Qingdao as a modern marine city, highlighting the efforts of Qingdao Unicom in enhancing network coverage and technology innovation to facilitate the growth of the marine economy [1][12]. Group 1: Marine Communication Network Development - Qingdao is focusing on building a modern marine industry system and expanding its marine economy, with a strong emphasis on enhancing marine communication networks [1]. - Qingdao Unicom has achieved 5G coverage in nearshore areas, with download speeds reaching 44.9 Mbps and upload speeds of 2.75 Mbps at depths of nearly 100 km offshore [1]. - The integration of 5G technology with broadband satellite communication has created a comprehensive "land-sea-air" network, addressing communication challenges at sea [1]. Group 2: Contributions of Key Individuals - Wang Jun and Teng Jing have dedicated 30 years to ensuring reliable communication on Ling Shan Island, significantly improving the local communication network [2][3]. - Wang Jun has been instrumental in establishing the island's fixed-line virtual network and has worked tirelessly to maintain communication services under challenging conditions [3][4]. - Liu Decai has led the deployment of communication base stations on Qianliyan Island, overcoming environmental challenges to connect the island to modern communication networks [10][11]. Group 3: Impact on Local Economy and Society - The efforts of Qingdao Unicom employees have transformed Ling Shan Island from an "information island" to a connected community, enhancing the quality of life for residents and boosting local tourism and economic activities [5][12]. - The completion of the wireless network coverage in the main channel of Qingdao Port marks a significant milestone in achieving high-speed connectivity across multiple islands, facilitating better communication and economic integration [11][12]. Group 4: International Communication Infrastructure - Qingdao serves as a crucial landing point for international submarine cables, enhancing its role as an important hub for global internet connectivity [6][7]. - The maintenance and protection of these submarine cables are vital for ensuring the stability of international communication networks, with dedicated teams working to safeguard these critical infrastructures [7][8].