It should be Xugong's fast calculation from abacus mental calculation to hand-brain operation, which is a simple algorithm from special number to arbitrary number operation. The abacus mental arithmetic can't be said who invented it, and there is no clear record, but the quick calculation of hand-brain operation passed the national appraisal in 1999. At present, the report at that time can also be found on China News Network of China News Service (website:/1999-12-7/26/1.html), which is referred to as "quick calculation with hands and brains". It only took more than ten years to make the market share of hand-brain quick calculation exceed that of abacus mental calculation with a history of thousands of years. 20 12 xugong digital education, developed by xugong institute of hand and brain quick calculation, has turned quick calculation education into mathematical thinking education, and children's calculation speed and ability can be easily trained. The first person in China is Xu from the Institute of Fast Computing of Hand and Brain.