China's Yungang Buddhist Grottoes installs toilet timers in restrooms to manage visitor usage.

China's Yungang Buddhist Grottoes, a UNESCO-listed World Heritage site, has installed toilet timers in its restrooms to manage visitor usage. A video showing the timers, which display the time each toilet cubicle has been locked, has drawn mixed reactions on Chinese news and social media sites. Each stall has its own digital counter with the LED screen displaying "empty" in green when unoccupied and the time locked when in use.