The tourism-boom province of Quang Ninh on December 23 launched a massive campaign calling on the world to vote for Ha Long Bay as a world natural wonder.

The event drew Deputy Prime Minister and Foreign Minister Pham Gia Khiem, members of the Hanoi-based foreign diplomatic corps, local leaders and executives from leading companies as a gesture of keen in this issue.

Opening the ceremony, Deputy Foreign Minister Nguyen Van Tho said the campaign to promote Ha Long Bay will make the world natural heritage site widely known among the international community, along with the country’s cultural and traditions.