Chinese Stocks Slump Most in Three Weeks as Manufacturing Slows

China’s stocks fell, dragging the benchmark index down the most in three weeks, as a gauge of manufacturing for this month slowed more than estimated.

Anhui Conch Cement Co. slid 5.9 percent and Sany Heavy Industry Co. lost 3.9 percent, pacing declines by construction-related companies. China Minsheng Banking Corp. slumped 4.7 percent as financial companies retreated. The preliminary reading of a Purchasing Managers’ Index fell to 50.5 for April from 51.6 in March, according to HSBC Holdings Plc and Markit Economics, compared with the 51.5 median forecast of economists.