At the end of last year, President Xi Jinping said Hainan, China's southernmost island province, was rapidly developing into a duty-free port -- an indication that his so-called "dual circulation" economic strategy was already paying dividends.The island is being promoted as somewhere Chinese who are unable to travel overseas because of the coronavirus pandemic can head for binge shopping, making it a model for the expansion of domestic demand linked to the world economy that Xi hopes to achieve in the future.Known by locals as "China's Hawaii," the island, roughly the size of Kyushu in sou…READ FULL ARTICLE