Spend enough time following the dangerous and disgusting trail of Chinese food contamination scandals, and one theme recurs: No matter how weird or disgusting the scandal, it's probably happened before and — assuming it's profitable — it'll almost certainly happen again.

The latest involves a "mom and pop" duck blood counterfeiting ring that was recently uncovered in China's rural Jiangsu province. The details, as related by Xinhua, China's state-owned newswire, were not appetizing:

"The couple who own the shop bought chicken blood instead of duck blood at extremely cheap prices, added inedible dyeing and printing agents to make the blood solid, before selling the products to local markets."