More than 150 heavy industrial polluters in Beijing suspended production on Sunday. The new rules are in effect for two months in a bid to cut pollution and improve air quality.

In the Yanshan Cement Plant in Beijing's western suburbs, paper seals have been placed on workshop doors. Another heavy polluter -- the Beijing Capital Iron and Steel Group, or Shougang -- is being told to cut output by 70 percent by shutting down four of its five steel-making furnaces.

As part of its Olympic bid, Beijing promised to clean up its air quality for the Games. Various neighboring areas -- including Tianjin Municipality and Hebei and Shanxi provinces have also taken similar measures to cut pollution.

(CCTV July 21, 2008)