Sanmen Island
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| Provinces | Guangdong Province |
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| Date of Reg. | |
| Date of Upd. | |
| ID | 2339921 |
About Sanmen Island
Sanmen Island is an island in Daya Bay. Administratively it belongs to Huizhou. It lies 1. 5 and 8. 7 nautical miles to Dapeng Peninsula, Shenzhen and Sai Kung, Hong Kong respectively. Its highest point is 298 meters above sea level. It is 5 km² in size and has a coastline of 13 kilometers.