The answer is: uninvited guests

Pinyin: bê s ê zhè kè

Explanation: speed: invitation. An uninvited guest.

Source: Zhouyi Xu: "There are three uninvited guests coming, and it is a good luck to respect them."

For example, such an unexpected uninvited guest was sincerely welcomed. ★ Guo Moruo's Sea Ji Tao Crossing the East China Sea?

Pinyin code: bszk

Synonym: not invited

Antonym: Special Guest

Two-part allegorical saying: Snails go to eat; People who come by car