The so-called "the arrow flies through the clouds" means that with the cry of Li Zicheng's arms, the world's anti-thieves come from the clouds.
At that time, a lot of propaganda work was done on the myth of Li Zicheng. Similar sentences included "Eighteen sons' main artifact" and eighteen sons' character was also "Li".
Later, Li Zicheng failed, but other people who wanted to oppose the imperial court, such as Hong Xiuquan and narcissistic friends, also found this sentence a bit mysterious and deceptive, so they all quoted it. At this time, this sentence has become "slang", and "one arrow through the cloud" means rebellion.
Later, this sentence appeared in Stephen Chow's Kung Fu.