Jack Ma asked these four questions on the blackboard: 2 2=4; 4 4=8; 8 8=16; 9 9=19. The employees said one after another: "You made a wrong calculation." Ma Yun turned around and said slowly: "Yes, everyone can see clearly that this question was calculated incorrectly. But I calculated the three questions correctly before, why no one praised me, but only saw me It's a miscalculation! "The same is true in life, if you treat him well ten times, he may forget it, but if he doesn't go well once, everything may be wiped out. This is the principle of 100-1=0 human nature. ——It is worthy of everyone’s reflection!