Chinese children are much taller and stronger than they were four decades ago with the height gap standing at 8 cm a government survey showed on Wednesday. The National Health and Family Planning Commission (NHFPC) surveyed 161774 healthy children under seven-years-old from nine cities and their suburbs in 2015. Health authorities have conducted the survey once every 10 years since 1975 Xinhua news agency reported. Taking children aged five to five-and-half years old for example the boys on average measure 113.6 cm 8 cm taller than boys in 1975 and 1.7 cm taller than boys in 2005 while girls have