2 sentences for 操作 (cāo​zuò — manipulate)

1. 由于幕后操作，股票价格突然大幅上涨。

   yóu​yú mù​hòu cāo​zuò, gǔ​piào jià​gé tū​rán dà​fú shàng​zhǎng.

   The stock price surged suddenly due to behind-the-scenes manipulation.

   Source: Dong Chinese Dictionary

2. 央行通过公开市场操作来调节市场上的流动资金。

   yāng​háng tōng​guò gōng​kāi shì​chǎng cāo​zuò lái tiáo​jié shì​chǎng shàng de liú​dòng​zī​jīn.

   The central bank regulates the liquid capital in the market through open market operations.

   Source: Dong Chinese Dictionary