Early this year, the Food and Agriculture Organization of the United Nations (FAO) issued a special alert warning that North China, the country's wheat basket, was suffering from a severe winter drought that could devastate China's wheat harvest, putting further pressure on world wheat prices that have been rising rapidly in recent years.

Underlying the FAO's warning is the central message that should China lose its winter wheat crop, it will go to the international grain market to make up any shortfall. The sudden entry of such a huge buyer could certainly rock the international food markets.

However, the FAO's warning is a false alarm. First, because for the past six to seven years, China has lost around 7 percent of its annual grain output to various forms of natural disasters, and yet its annual grain production has been on the rise. In 2010 China's total grain production was a historical record of 546 million tons. Second, successive years of bumper grain harvests have enabled China to build up a large grain reserve of more than 40 percent of its annual consumption - much higher than the world average of around 17-18 percent. The growth in grain productivity for the past three decades has been very impressive, particularly since 2004.

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China's population accounts for 21 percent of the world's total population, but the country is endowed with only about 9 percent of the world's arable land. Feeding such a vast nation, with such an unfavorable man-land ratio, has always been a great challenge for China's rulers, past and present. Hence the old Chinese adage: "An economy without strong agriculture is fragile, and a country without sufficient grain will be chaotic".

Even in modern times it remains an enormous task for the Chinese government to ensure food security. China's serious food crisis between 1959-1962 is still fresh in the collective memory of the present generation of Chinese leadership. Therefore, China has always taken food security very seriously, much more so than many other countries. Food security in China basically means "food self-sufficiency", with the bottom line set at 95 percent of domestic grain supply.

Such a stringent definition of food security naturally puts an additional burden on the government. The problem is aggravated by the fact that for the past three decades, China's total population increased from 960 million in 1978 to 1.3 billion in 2009, while arable land, the total sown area, increased only marginally by 5.4 percent.