Gyoza dumplings produced by a Hebei food factory were recalled after Japanese died of pesticide poisoning. An intensively contended joint investigation did not find a conclusive theory as to where and how the dumplings were poisoned. Japanese police determined the poisoning took place in China before being imported to Japan, while the Chinese police proclaimed the poisoning could only happen after it reached Japanese shore.
During the investigation, dumplings were recalled from the shelf of stores. Chinese government allowed these batch of dumplings re-entering the retail market, in China of course. Many more Chinese were to be poisoned to death in the months followed by this greedy and blind decision.
The Chinese Foreign Ministry formally admitted the guilt to the Japanese government in a statement made August 7, 2008, one day before the opening ceremony of the 2008 Summer Olympic Games to be held in Beijing.