China releases a report on a rare coral-reef blue hole at Huangyan Dao

Xinhua—China releases a report on a rare coral-reef blue hole at Huangyan Dao

• Xinhua — China releases a report on a rare coral-reef blue hole at Huangyan Dao
• Xinhua — China releases scientific report on rare coral reef blue hole discovered at Huangyan Dao
• South China Morning Post — China discovers a rare blue-hole coral reef in the disputed Scarborough Shoal