Skyray and CTI made names for themselves by providing milk-testing equipment and services widely used by dairies in China since the 2008 tragedy. Skyray also helped trace pesticide-laced cowpeas sold in several cities in 2010, and illegally recycled cooking oil, called "gutter oil," found in the Shanghai region last year.
Another recent analyst pick is Sunner Development, a Shenzhen-listed poultry processor that sells chicken to KFC and is considered a national leader in safe meat production. A hog-farming and processing company Truein Group, also listed in Shenzhen, is a favorite for raising chemical-free animals including a special breed called the Tibetan pig.
>>Read More: 4 Reasons Why Natural Gas Prices Will Tumble>>Read More: Here's Why Apple Can't Dawdle in Replacing Leadership At the time of publication, the author held no positions in any of the stocks mentioned. This article represents the opinion of a contributor and not necessarily that of TheStreet or its editorial staff.