System's Decibel

Modern-day man Qin Ming just complained online—while scrolling short videos—about a scrap collector woman who blasted her loudspeaker nonstop, asking sarcastically, 'What's the point of inventing loudspeakers? All they do is disturb the neighborhood!' The next thing he knew—he woke up at the Great Wall! And his system ordered him to install 2,000 loudspeakers along it.