BEIJING — The Chinese have become largely inured to tales of voracious officials stockpiling luxury apartments, $30,000 Swiss watches or enough stolen cash to buy their mistress a Porsche.

But when images of a bulbous-faced Communist Party functionary in southwest China having sex with an 18-year-old girl spread on the Internet late last month, even the most jaded citizens took note — as did the local party watchdogs who ordered his dismissal.

These have been especially nerve-racking times for Chinese officials who cheat, steal and bribe. Since the local bureaucrat, Lei Zhengfu, became an unwilling celebrity here, a succession of others have been publicly exposed. And despite the usual cries of innocence, most have been removed from office while party investigators sort through their bedrooms and bank accounts.

In the weeks since the Communist Party elevated a new slate of top leaders, the state media, often fed by freelance vigilantes, have been serving up a head-spinning collection of scandals.