Knowledge of affairs

Example ： When transferring money ,A The user transfers money to B user , The hope is that ：A Buckle the money ,B Added money ; Or is it A Transfer failure ,B The amount of money has not increased .

The principle of dealing with affairs ： Or both , Either not

understand ： A transition from one state to another . Otherwise, return to the original state

Automatic submission ：

So much for the time being .