Here is an update to the poisoned China dumplings case. After Xinhua says China Says Tainted Dumplings Not Poisoned at Plant(Bloomberg), there turned out other possibilities of who poisoned the dumplings, from Reuters:
Activists opposed to Chinese government ties with Japan may have contaminated Chinese-made dumplings that caused 10 people in Japan to fall ill, Japanese media quoted a senior Chinese food safety official as saying on Wednesday.
The discovery of pesticide on the dumplings has received widespread media coverage in Japan, prompted health queries from nearly 4,000 people and led the importer of the dumplings, Japan Tobacco Inc, and rival Nissin Food Products Co Ltd to call off the planned merger of their frozen food operations…
Japan’s health minister has also raised the possibility that the food had been deliberately contaminated. Chinese government officials were not immediately available to comment.