Curbing soaring prices has become a priority for China. In May the consumer price index (CPI), a measure of inflation, reached 5.5 percent year-on-year, a 34-month high, according to the National Bureau of Statistics.

Inflation is the result of the government's loose monetary policy since late 2009 which allowed extra money to flow into the economy, says Liu Lingling, professor of economics at Tsinghua University. The broad currency supply, or M2, in China reached 76.34 trillion yuan ($11.78 trillion) in May.

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Since it is impossible to take back the extra money by tightening the monetary policy, it is important to analyze the types of inflation China faces and pay more attention to the fiscal policy, Liu says.

Two types of inflation have pushed the CPI to a historic high, namely, imported inflation and cost-push inflation.

The second round of quantitative easing (QE2) in the United States, the deprecation of the US dollar and the debt crisis in the eurozone, have increased bulk commodity prices in international markets and, by default, raised the cost of China's imports. They have prompted more international hot money to flow into China, too. But despite being highlighted by the Chinese media, imported inflation is not a significant factor.

The cost-push inflation - inflation caused by substantial increases in the cost of necessary goods or services for which no suitable alternative is available - is more dominant, she says.

Three factors have paved the way for China's rapid economic growth with relatively low inflation over the past three decades: comparatively cheap labor, government-controlled prices of natural resources including gas, water and electricity, and the ignored environmental cost. They contributed to the relatively low cost of production.

But all the three costs are rising now.

The Chinese economy faces a shrinking migrant workforce because of demographic changes. The shortage of migrant workers in recent years is there for all to see.

Authorities control the prices of important natural resources, too, a practice that has survived since the planned economy days. The problems that the distorted prices created lay dormant and have surfaced today.