A Chinese genius flexed his mathematical prowess by solving a problem that flummoxed a team of mathematicians with Ph.D.s for four months in a single night. Wei Dongyi, a 30-year-old assistant mathematics professor at Peking University in Beijing, came to the rescue after six mathematicians called him for help as they tried building a complex mathematics model. After using the equations he provided to alter their experiment, the team’s model obtained a passing rate of over 96%. The mathematicians wanted to pay the professor to show their gratitude, but he declined. "It’s unnecessary to pay me for such an easy...