I'm sure you've read about it in the news recently (http://shanghaiist.com/2014/10/06/guangzhou-woman-finds-live-worms-in-kfc-chicken-wings.php), well it happened to me yesterday.
I was down to my last bit of my burger only to find I'd been eating slimey grey meat. Nice. Fast forward to the evening and I started feeling dizzy, cold and aching all over. Shortly after I'm enjoying V & D.
Here's the address
It's on Yidu Road, right next to Ito-Yokado in the east of chengdu on the second ring road.
Maybe give it a miss.
I had food poisoning 3 weeks ago in Sri Lanka.
Raw honey really helps settle everything if you have any.
Hope you feel better.