On December 17, 1994, in the 18th session of the Council in the UNESCO world heritage held in Thailand, Ha Long Bay was officially recognised as a world natural heritage value of aesthetic terms, according to the standards of the International Convention on the protection of the natural and cultural world. On December 2, 2000, at the 24th Conference in Cairns, Queensland, Australia, World Council recognized the HA Long Bay world heritage 2 standard about geology, geomorphology value.
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