China's widening wealth and income gap is posing a serious threat to its social stability, senior Chinese sociologists warned on Friday.

"There has been an increasing number of mass disturbances occurring in recent years related to the yawning gap between the rich and the poor," Yan Ye, the vice-professor of the North China Institute of Science and Technology, told China Daily on Friday in Beijing.

The latest warnings are based on research of six cases of mass disturbances that broke out in 2008, including the Weng'an incident in Guizhou province, the Sanlu tainted milk scandal and taxi drivers' strike in Chongqing municipality.

Unbalanced income among different sectors of the economy topped the reasons behind the threat to the country's social stability, according to Yan's research report in the book titled Social Structure of Contemporary China, released by the Social Sciences Academic Press on Friday.

The government should strengthen supervision to control "a number of senior managers' high incomes in monopolistic industries", Yan said.

The huge gap between the urban and rural regions could also cause an increasing number of migrant workers to desire living in the cities rather than the countryside, the report showed.

"About 55 percent of the Chinese population live in rural areas, but they share just 11.3 percent of society's wealth," Yan said.

At the same time, no province in China currently meets international minimum wage standards, Yan said.

Based on international standards, the minimum wage should be 40 to 60 percent of the average monthly wage, the report said.

Government policies to increase minimum wage standards have also slowed amid lessening pressure on enterprises since the economic crisis in 2008, it said.

As such, government, enterprises and employees should discuss the minimum wage standard, Lu Xueyi of the Chinese Academy of Social Sciences, said on Friday.