Nation still has the world's highest ratio of male to female newborns

As young lovers worldwide mark Valentine's Day on Tuesday, millions of Chinese men face the prospect of spending life without a wife, according to a population expert.

Yuan Xin, a professor at Nankai University in Tianjin, said his calculations based on the government's birth data indicate that 30.5 million more males than females were born in China between 1980 and 2015.