I did a little reading on China pork industry lately. I found 3 pork producers listed in Shenzhen, Hongkong and the US. There are Henan Shuanghui (000895 Chinese, English), Nanjing Yurun (1068.HK), and Henan Zhongpin (Nasdaq: HOGS).
I believe they are three major pork producers, and the sales of pork are also in this order (descending): Shuanghui, Yurun, Zhongpin. I remember I ate many Shuanghui sausages while in college. I also determined that was junk food (not much real good meat) recently.
Interestingly, as of Friday May 23, the PE (price earning, ttm) ratio of those three are also in this order: 44 for Shuanghui (000895.SZ), 22 for Yurun (1068.HK), and 13.4 for Zhongpin (HOGS, Yahoo Finance). Assume the companies has similar profit margin and financial leverage, the different PEs shows how different market values the similar business (pork/food) in mainland, Hongkong and the US.