A probe into possible price-fixing by foreign milk suppliers prompted one company, Nestle SA, to announce a price cut.
Today, news reports said a Cabinet agency is looking into the cost of drugs made by 60 foreign and domestic suppliers. There was no indication of wrongdoing, but the probe could be a prelude to a cut in government-set caps on prices.
The action could help the new Communist Party leadership that took power last year show its solidarity with a public frustrated by skyrocketing costs for housing, education and health care that have outpaced income gains.
Inflation is politically dangerous for the unelected communist leadership because it erodes the economic gains that underpin the party's monopoly on power.
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The ruling party also has tried to curb soaring housing costs with controls on lending and purchases, but prices are still rising.
Both medicines and milk are industries in which scandals over faulty and sometimes deadly products have given foreign and Chinese producers with a reputation for better quality an unusual degree of leverage to charge higher prices.
Chinese authorities did not accuse baby formula suppliers of collusion in setting prices, which can be hard to prove. Instead, the investigation focused on prices they required retailers to charge.
In response, Nestle SA announced it would cut infant formula prices in China by an average of 11 per cent starting Monday. Other companies including Danone Dumex, Abbott Laboratories, Mead Johnson Nutrition Co. And FrieslandCampina said they were cooperating with the investigation but did not immediately respond to questions about whether they would cut prices.