After several quality problems in the past few months, Carrefour has begun to tidy its supply chain with the launch of a global supplier call center in Tianjin.
Suppliers can use this call center to deal with information management, business consultations and market surveys.
Carrefour will also send audit personnel to different stores to investigate possible corruption issues inside the company.
Carrefour had problems in June when its Fangzhuang Store in Beijing was found to be selling fake Adidas footballs promoting the 2006 World Cup.
In May, local media reported that a man surnamed Wu, a frequent customer of Beijing's Carrefour Shuangjing Store, said he had bought a bag of bread from the store, only to find that the bread smelled bad and had a surprising date of 2007 on the package. Usually bread has an expiration date of a few days or weeks after purchase. A representative from Carrefour Shuangjing Store said they would double compensate Wu for the value of the bread, but Wu refused the money.