The Qionghai Grand Passage Across the Qiongzhou Strait: A Century Project Connecting Hainan and the MainlandHainan, China's second-largest island, is located in the South China Sea, separated from the mainland by the Qiongzhou Strait. As China's largest special economic zone, the launch and operation of Hainan's Free Trade Zone, together with the national strategic development of the "Beibu Gulf Economic Zone," have sparked a wave of strategic projects in the Beibu Gulf, starting with the "Pinglu Canal" in Guangxi...