A lot of luck that can change people, families and even the National Games is often created by the word "if".

for example.

in the Southern Song Dynasty, if a soldier who was guarding Xiangyang didn't use a stone throwing machine, he would be seriously injured and eventually killed, and the Southern Song Dynasty would not last for another 50 years.

on the battlefield of World War I, if a soldier fails to show kindness when fighting against Germany and leaves a man named Adolf in the enemy's hands, maybe World War II will not happen.

the same.

if it's not a good day for Changzhuang Yu, a misty fellow,...