The trial has begun in China of four executives of the company at the centre of the contaminated milk scandal, which left at least six children dead.
The official Chinese news agency, Xinhua, said the former chairwoman of the Sanlu Group, Tian Wenhua, was among those in court.
She and three other executives face charges of producing fake or sub-standard products.
In the past week, 17 people have gone on trial for links to the scandal.
Trial for death
The four top executives of Sanlu could face the death penalty if convicted.
Alongside Ms Tian are the deputy general managers Wang Yuliang, Hang Zhiqi and Wu Jengsheng.
Xinhua reported court sources as saying that Mr Wang is in a wheelchair after losing his legs in a suicide attempt.
Ms Tian told the court that she first learned of tainted milk complaints in May and then set up a working team under her leadership to handle the problem.
Xinhua added she said she reported on the problem to the city government on 2 August; Sanlu stopped production on 12 September.
It was not known how long the trials at the Shijiazhuang Intermediate People's Court in northern China would last or when the verdicts would be announced.
Seventeen others have gone on trial over past few days with at least four facing the death penalty, Xinhua said.
The defendants included people accused of producing melamine and marketing it to milk producers, as well as milk collectors who mixed the chemical into raw milk sold to major dairies.
High profile
The high profile of the trials is being taken as an indication of the central government's desire to be seen to be tackling the damaging scandal.
The government has also announced a $160 million compensation plan but parents and their lawyers say it is too small.
The industrial chemical melamine was added to milk to give the appearance of improved protein content.
The company allegedly delayed revealing the practice even after baby illnesses rose, forcing its foreign partner, the New Zealand dairy firm Fonterra to alert the Beijing government.
It also is alleged to have resisted demands to recall its product, raising concerns about poor regulation and enforcement of food safety rules in China.
Melamine was then found in a wide range of Chinese food products, some of them exported around the world.
Sanlu has since been declared bankrupt, and analysts have said China's dairy industry faces many challenges if it is to recover.
Melamine tableware?
Chinese quality inspectors are now investigating tableware for melamine levels, following reports it became dangerous when hot, Xinhua reported.
China's General Administration of Quality Supervision, Inspection and Quarantine "has always put great stress on food and tableware product safety", Xinhua quoted it as saying.
(BBC)
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