Cailian,

One lesson is to de-escalate immediately when people make mistakes. Keep it sane, and don't pander to a public outcry because it will worsen the situation.

I wrote "America Must U-Turn and Avoid a Collision with China," which I invite you to read—the escalation of events because of poor leadership coupled with popular sentiment.

You may enjoy "Donald Trump, the White House Clown?"

Best.