Authorities in Shanghai and Jiang-su have urged local supermarkets to test their products amid concern that food and ingredients containing a plasticizing agent have reached the Chinese mainland from Taiwan. They are demanding all such products be taken off the shelves.

More than five thousand bottles of a sports drink imported from Taiwan have been found to contain the cancer-causing chemical.

On the list of ingredients, there is no sign indicating the agent has been added.

Wal-Mart, one of the two main supermarkets selling the drinks, has removed all the contaminated products and is waiting for orders on how to deal with them.

Lu Lei, Vide General Manager of Walmart, said, "The headquarters is waiting for the official request to deal with the products. We will follow the the guide, if we are asked to destroy them, we will do it. And if the drinks are recalled, we will send them all back."