A photo exhibition on the country’s sea and islands opened to the public on May 15 in the northern mountainous province of Yen Bai.

Held by the provincial Department of Culture, Sports, and Tourism, the event aims to help local people learn about the homeland’s beauty and increase their awareness about national sovereignty over the sea and islands.

On display are historical documents affirming Vietnam’s indisputable sovereignty over Hoang Sa and Truong Sa archipelagoes, including some old Chinese maps showing the southernmost point of China as Hainan Island. There are also nearly 50 photos on soldiers safeguarding the nation’s waters and airspace on Truong Sa archipelago.

The exhibition will run for one month and then move on to show in other areas in the province.