Deputy Prime Minister Vu Duc Dam has assigned the task of compiling a dossier to the People’s Committees of Hai Phong and Quang Ninh and relevant agencies. The dossier will seek UNESCO recognition of Ha Long Bay–Cat Ba Archipelago as a world natural heritage site. It must be compiled in accordance with the 1972 World Heritage Convention and Vietnam’s relevant regulations. Ha Long Bay spans 1,553 square kilometres and includes 1,969 islands of various sizes. It has twice been recognised as a UNESCO World Heritage Site, in 1994 and 2000. Meanwhile, Cat Ba Archipelago covers more than 17,000 hectares of land and 9,200 hectares of sea. It boasts an ecological system typical of Vietnam, including tropical rain forests on limestone islands, mangrove forests, coral reefs, sea grass, sand beaches and cave networks.