Who said Beijing's dragon energy was exhausted?

Beijing’s dragon energy is exhausted is an Internet buzzword, which originated from the online novel "Zhe Tian Ji" in mainland China. It was later used by netizens to ridicule the severe smog in Beijing. In the novel, Beijing's dragon energy is compared to a kind of energy, which is considered to be one of the important factors supporting Beijing's prosperity. However, at the end of the novel, Beijing's dragon energy is exhausted, leading to the gradual decline of Beijing's luck. Therefore, some netizens use the phrase "Beijing's dragon energy has run out" to describe Beijing's fortunes as having declined, as if it has lost its previous prosperity and glory. This statement has also been used by some people to ridicule Beijing's air quality and other issues.