China on alert over a nuclear neighbour

As international tensions over North Korea have soared, China has deployed extra combat units of the People’s Liberation Army (PLA) to man the border from the Yalu River in the south to the Tumen River near Russia - evidently fearing the risk of chaos and collapse [in North Korea].

The bomb test could come as early as today, the eighth anniversary of Kim Jong-il’s ascent to the top of the North Korean Workers’ party and one day before South Korea’s foreign minister, Ban Ki-moon, seeks election as secretary-general of the United Nations.

China’s dilemma is that its ruling elites are still bound to those of North Korea by a like-minded political authoritarianism. President Hu Jintao has even praised North Korea for keeping to its Stalinist politics, a view he may be repenting now that Kim has brought China to the brink of a nuclear crisis.

Beijing’s main fear is that if Kim tests a bomb - the CIA believes he has enough plutonium for four; other US experts think more - then Japan will feel it has no choice but to acquire its own atomic arsenal. That would destroy the balance of power in northeast Asia that has kept the peace since the end of the second world war.

The Chinese authorities are also irate over an influx of counterfeit US dollar bills and vast quantities of fake Viagra from North Korea. Some 50,000 Chinese gamblers a year are estimated to cross the other way to squander their money, much of it suspected to be the fruits of official corruption, in a North Korean casino.