For the first time, China has produced Fields Medal winners educated on its own soil – and two at once.Chinese mathematicians Wang Hong and Deng Yu took the honour, alongside John Pardon and Jacob Tsimerman.The Fields Medal is the top honour for young mathematicians under 40 years of age. The medals, along with a modest cash prize, were given out on Thursday at the International Congress of Mathematicians (ICM) in Philadelphia.The prestigious medal, often called the “Nobel Prize of...