Black-brown beef tripe covered in tiny bumps, the 'hair' of its name; no Sichuan or Chongqing hot pot is complete without it. Dipped up and down in the boiling broth for about 15 seconds it stays crisp; longer makes it tough.
Beef tripe swished in red broth for seven seconds is the most tender.
Tips
culture
Named for the shaggy, hair-like lining (毛 'hairy') of the beef rumen, a cow's first stomach. The 七上八下 rule - dip seven times up, eight times down (about 15 seconds total) - is the famous Chongqing hot pot timing for getting the texture just right: crunchy but not rubbery.