Global submarine fiber optic cable distribution map

Do you know how many undersea fiber optic cables there are in China, where they are connected to, or what is the distribution of undersea fiber optic cables around the world? You can check it through this global undersea cable distribution map, which was developed by combining Google Maps and Wikipedia data, and you can visualize several undersea cable entrances in China in Qingdao, Yangtze River Delta, Pearl River Delta, and Shantou.