More young people 'less willing' to do heavy labor, although construction wages are higher

China's migrant workforce reached 277.5 million in 2015, an annual rise of 1.3 percent, but the year-on-year growth rate has been decreasing since 2011, according to the National Bureau of Statistics.

A report released by the bureau on Thursday said the growth rate dropped 0.6 percent in 2015, and the percentage of workers younger than 40 years dropped 1.3 percent to 55.2 percent. The average age is 38.6, about four months older than in 2014.