On this day in 1917, an explosion at a coal mine run by a Japanese railroad company in Fushun, northern China’s Liaoning Province, killed 917 miners.
On this day in 1922, insulin was used for the first time with success in the treatment of diabetes.
And on this day in 1943, the new Sino-British Treaty and the new Sino-American Treaty were signed in Chungking and Washington respectively, marking the end to the unequal treaties China was forced to sign with foreign countries.