This phrase first originated from a post on the stock bar on December 15, 2011, and the reason for the post was the famous Chongqing Beer Black Swan incident-on December 7, 2011, the listed company Chongqing Beer (stock code: 600132) issued an announcement announcing that the hepatitis B vaccine that the company invested heavily in for 13 years has been evaluated by clinical trials as having no significant efficacy, and its efficacy is only 1-2 percentage points higher than that of a "placebo". As soon as the announcement was issued, the stock price fell immediately. It fell by the limit for 9 consecutive times with the word "one". The stock price fell from 80 yuan to 20 yuan, and the market value of more than 20 billion yuan evaporated instantly. And this stock bar post was published on the night when the sixth "one" hit the limit.