"There's so much to do with online food ordering and delivery," Liu said. "A law was unveiled in 2011 but the sector has made major strides since, and nearly 90 percent of the terms in the law are in need of revision."

The local food market watchdog earlier this year set up a team specializing in overseeing online food ordering and delivery platforms and the vendors that sell food through the platforms. More than 33,000 unlicensed active vendors were driven out of the market.

Local rules

1 Yunnan province

Highly toxic farm chemicals are prohibited from being sold or used on tea plantations, at scenic spots, nature reserves, wildlife habitats or other key areas specified by the provincial government.

2 Chongqing municipality

Those who hold family banquets in rural regions must report information, including the time of the meal, number of participants, list of the dishes, and the chef's health status to the village government at least two days ahead of the banquet. The organizer of the banquet must then keep a sample of each dish for at least 48 hours after the event.

3 Zhejiang province

Small workshops are prohibited from making food products, including dairy products, canned food or foods designed for special groups, such as infants, the elderly or pregnant women.

zhouwenting@chinadaily.com.c