BEIJING (AP) - Already China's biggest restaurant operator with 4,600 outlets, KFC is pursuing Chinese consumers so avidly it opens two more every day.

That dramatic growth comes with a big catch: KFC's quality control is struggling to keep up.

The Louisville, Kentucky-based chain is reeling after a Chinese supplier was accused of selling expired beef and chicken to it, McDonald's and possibly other restaurant chains. Just 18 months earlier, KFC's sales plunged in China after a suppl