During the 2012 apocalypse, the South China Sea was hit by massive earthquakes and was shifted from its original position to where the Pacific Ocean used to be when the Earth's crust shifted. It was the original landing where the Curtis Family, Gordon Silberman, Sasha, Tamara and the Karpov Family on board the Antonov 500 when it was running out of fuel. Fortunately, since the entire state of China was now where the Pacific Ocean was, the group finally arrived in Cho Ming Valley, where the Arks are located, saving them from landing in water. A megatsunami at the height of 1500 meters swept away the South China Sea when the Worldwide Flooding occurred.
When the apocalypse ended, the South China Sea is now currently submerged underwater.