ㄒㄧㄥㄉㄨㄥˋㄓㄨㄥˋxīngshī‑dòngzhòng

兴师动众
  1. 動用)​。 首長視察興師動眾小學生來夾道歡迎」。

to muster large forces, to get a great number of people involved (in carrying out some task)​
(expr. idiom.)​ mobiliser beaucoup de monde