It's not immediately clear why the 121-foot-high homage to Mao Zedong in central China was brought down, but widespread ridicule might have had something to do with it.
Saudi Arabia's spate of 47 executions last week continued a trend from 2015, in which several countries that have the death penalty used it more often.
Five booksellers have disappeared. "Everything is normal," one allegedly wrote in a fax to a colleague. But many doubt it, and suspect he and the others have been abducted by mainland Chinese agents.
Among the factors blamed for China's drop: poor economic data and a looming rules change for large investors. Markets in Europe and the U.S. also were down.