China's foothold in South China Sea: analysts reveal endgame to Beijing's reclamation efforts
Beijing aims to use reclamation in the South China Sea as a base before extending its naval reach to the world, analysts say
It is an open secret among military watchers that for years, the United States has had the ability to monitor the southern coastline of China.
But last week, amid heightening tensions, a US spy plane flew deliberately into a disputed region of the South China Sea.
The P-8A Poseidon aircraft went over the areas where China had created islets through extensive land reclamation. Immediately, the Chinese navy issued eight warnings before the plane - which had on board a CNN television crew - went away.
"This is the Chinese navy, this is the Chinese navy, please go away quickly," said the recorded radio transmissions between the Chinese navy and the US spy plane, which were declassified and released by the US Navy.
Watch: US spy plane in tense radio exchange with Chinese navy over South China Sea
The US has since said it publicised the incident to raise awareness of China's massive land reclamation activities in the disputed waters.