A system for keeping track of livestock and poultry will be implemented throughout Zhejiang province to prevent instances like the one in which more than 11,000 pig carcasses ended up in the Huangpu River earlier this year.

All livestock and poultry will wear an electronic ear tag so that any unsafe disposal of dead animals can be traced to individuals and farms.

Offenders will face punishment, said the Standing Committee of Zhejiang Provincial People's Congress, which presented the draft of the new legislation on Monday.