China's Huangyan Dao in the South China Sea represents a typical coral atoll. Its shape approximates an isosceles right triangle.
The Huangyan Dao area has maintained excellent marine environment quality, according to an official report.
China's Huangyan Dao in the South China Sea represents a typical coral atoll. Its shape approximates an isosceles right triangle.
The Huangyan Dao area has maintained excellent marine environment quality, according to an official report.
