Xiang Mingdong is quite a cunning member of a local political family, so he wouldn't do this himself; instead, he ordered Guan Xun to do it.
Guan Xun is a few years older than Xiang Mingdong, but they are classmates, and he's still a sycophant to the Xiang Family, so he does things with enthusiasm.
Guan Xun also understands officialdom and knows how to deal with men in office.
So, this guy directly arranged for his secretary team to dispatch drone pilots to watch Liu Zhizhong. How could he possibly believe that this guy's private life is squeaky clean? Once they get the evidence, it would be one of the stains on his profile as an official, leading to some thrilling subsequent developments.
Once such stain material is made public, the Disciplinary Inspection Committee would have to step in, and once they do, haha, any charge could be pinned on Liu Zhizhong, like embezzlement, bribery, and so forth.
