In 2008, a number of steps were taken in China in response to the 2008 Chinese milk scandal.
They were quoted as saying the perpetrators of the milk scandal responsible for the death of their child deserved to "die a thousand deaths".
Both the dairy trade and Sanlu were affected by the 2008 Chinese milk scandal.
The milk scandal became not only a public health issue, but a political one as well.
The Chinese government acted relatively quickly on the milk scandal in part to head off popular protests.
Major food safety incidents are rare but New Zealand was implicated in the 2008 Chinese milk scandal.
Following the 2008 Chinese milk scandal, in which contaminated infant formula poisoned thousands of babies, the salaries of wet-nurses there increased dramatically.
Mr Key said the Chinese Premier considers 2008's contaminated milk scandal a one-off incident that can be put behind both countries.
Zhao Lianhai was a worker who defended the victims of the 2008 Chinese milk scandal.
The 2008 Chinese milk scandal received the most attention among food safety incidents.