Four more people linked to the scandal have gone on trial on Monday, the official Xinhua news agency said.
This brings the number before the courts to 10, state media said.
On Friday, six people suspected of involvement in the scandal went on trial, and face sentences of at least 10 years, lawyers said.
Hundreds of thousands of infants fell ill and at least six died this year after China tunnel collapse kills three ...
Tainted China water sickens 450 ... melamine was added to baby milk products.
Those on trial are accused of adding melamine to raw milk to make it appear high in protein.
The company at the centre of the scandal, Sanlu, has already been declared bankrupt.
When the scandal broke in September, a chain of melamine producers and middlemen was found to have been supplying milk dealers with the product.
The dealers added melamine to boost the apparent protein content of milk, which had often been watered down to spread the raw product further.
Major dairy companies bought the milk from such dealers, failing to test the milk for purity and nutritional value.
The government scrambled to fight off allegations that it reacted slowly to the scandal, and promised to bring the culprits to court.
The scandal tarnished China's food industry far beyond its borders.
(BBC)
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