Beidahuang Agriculture Co Ltd said it is not affiliated with a Hong Kong-based edible-oil supplier with a similar name that was found to have sold tainted peanut oil.

Board Secretary Shi Xiaodan said her company has no connection to Hong Kong Beidahuang, and that Beidahuang Agriculture's Hong Kong subsidiary doesn't produce peanut-oil products.

The Hong Kong Food and Environmental Hygiene Department found food samples from Hong Kong Beidahuang that had high levels of benzopyrene, which can cause cancer in humans, according to the department's website.

Beidahuang Agriculture, based in Harbin city in Northeast China's Heilongjiang province, went public in Shanghai in 2002. It is one of the major agricultural companies in China.