Dongji Square, also known as Sun Square, is located in Heixiazi Island Town, Fuyuan City, Heilongjiang Province, at the confluence of the Fuyuan Waterway and the Ussuri River. It faces the Russian town of Kazakovetsvo to the east across the Ussuri River and borders Heixiazi Island to the north across the Fuyuan Waterway. Covering an area of 36,000 square meters, Dongji Square features the River Mouth Square, the Sun Pavilion, a veranda, a pole marker, a stele, a waterside pavilion, a boundary marker, a four-pole cultural wall, a map of China, a cultural stone at the entrance, a cruise ship pier, and a white marble fence. Every day, the sun rises in front of the pole marker at the easternmost end of the square.