Trong Mai Islet is a famous islet on Halong Bay. Trong Mai Islet has become a symbol of Halong Bay and also Vietnam's tourism. It can also be found with the name 'Ga Choi Islet' (rock of 'the fighting cocks').

Trong Mai Islet is located at the southwestern Halong Bay, about 5 kilometers from Bai Chay tourist wharf. The islet is about 10 meters high above the sea level. It has the shape of a cock couple rising from the blue sea. These two huge cocks have stood by the other for thousands of years. As the story told by the locals, Trong Mai Islet represents for faithfulness of love.

Trong Mai Islet is most beautiful at dawn, when the sun sheds the first shine of a day and light up the cock couple.

In a somewhat large expanse of open sea, Trong Mai Islet seems to grow up from the bottom of the deep emerald waters. At sunset, Trong Mai Islet with the height of over 10 m is bright red and in a somewhat tottery position.

Their tiny legs support heavy bodies, and it appears that one strong wave could throw the two stone blocks into the sea. However, hundreds of millions of years have passed, and Trong Mai Islet is still there. The image of the island is the logo of Halong Bay and Vietnam Tourism.