How a non-existent island became China's southernmost territory

Where is the "southernmost point of Chinese territory"? It's a controversial question and the least controversial answer might be Hainan Island . More controversial options would be the Paracel (Xisha) islands or the Spratlys (Nansha). But officially the southernmost point is even further south - as far south as the James Shoal, about 100 kilometres from the coast of Borneo. What's more surprising is that this piece of the motherland is actually invisible. There's nothing there to see, unless you have diving equipment.

The James Shoal lies 22 metres below sea. Yet this inconvenience doesn't prevent PLA Navy ships visiting the shoal from time to time to demonstrate Chinese sovereignty over it. This ritual involves heaving a large piece of engraved stone over the side of the ship. There is now a small collection of Chinese stelae gathering organic encrustations on the sea floor, more than 1,000 kilometres from Hainan.

How did the Chinese state come to regard this obscure feature, so far from home, as its southernmost point? I've been researching the question for some time while writing a book on the South China Sea. The most likely answer seems to be that it was probably the result of a translation error.

In the 1930s, China was engulfed in waves of nationalist anxiety. The predation of the Western powers and imperial Japan, and the inability of the Republic of China to do anything meaningful to stop them, caused anger both in the streets and the corridors of power. In 1933, the republic created the "Inspection Committee for Land and Water Maps" to formally list, describe and map every part of Chinese territory. It was an attempt to assert sovereignty over the republic's vast territory.