Shanghai Daily news

A local court has found 17 people guilty in the city's largest case involving the illegal production and sale of salt, officials said yesterday.
Seventeen people, all from other provinces, were sentenced to terms ranging from six months to two years in prison for illegally selling salt, producing salt and counterfeiting registered trademarks. Nine underground workshops were also shut down.
On February 23 last year, the Shanghai Salt Administration uncovered four illegal processing workshops that packed salt for industrial use and sold it as edible salt in Huacao area of Minhang District.
To guarantee industrial salt wasn't being sold to unsuspecting residents, the municipal government ordered the police to carry out an investigation at once.
The police formed a special team for the investigation. After 21 days, the police uncovered nine illegal workshops.
On April 15, the police raided the workshops and interrogated 53 people involved.
They rented warehouses or houses in the suburbs and bought salt for industrial use at low prices and small plastic bags with the trademark Haixing, a famous brand of table salt, police said.
Then they hired workers to pack the poisonous salt into the plastic bags and sold them to vendors at some wholesale markets.
Experts said industrial salt is poisonous and eating a large amount of it can prove fatal.