Shanghai will require companies that offer food ordering and delivery through online platforms to sign a contract committing them to unified standards of service.

The commitment, drawn up by the Shanghai food market watchdog, would require vendors to display their latest food operating license and to prepare food safely. The watchdog will keep a copy of the signed agreements to hold people accountable, according to the draft of the Shanghai Food Safety Law and Regulations that was recently submitted to the municipal legislative body for discussion.

"It will be the first time the rapidly developing online food ordering market has been brought under control through legislation in Shanghai," said Gu Zhenhua, deputy director of the Shanghai Municipal Food and Drug Administration. "All the vendors must register with their real names with the platforms and the platforms need to verify the qualifications of the vendors."

"If a platform finds a vendor has violated the terms, it must suspend cooperation with the vendor and report the incident to the watchdog. Otherwise, the platform will also be held accountable," he said.

Food ordering and delivery apps have been booming in recent years. Statistics from Analysys International, a Beijing-based internet consultancy company, show that the country's online food ordering and delivery transactions were worth more than 45 billion yuan ($6.96 billion) in 2015, three times higher than the previous year. The largest players - Ele.me, Meituan Takeout, and Baidu Takeout - are backed respectively by the country's internet leaders Alibaba, Tencent Holdings and Baidu Inc.

Meanwhile, complaints are rising. Statistics from the Shanghai Consumer Rights Protection Council show that, in the first half of last year, 200 complaints were received about the sector, which was a year-on-year increase of 138 percent. The complaints mainly centered on problems in food quality, delayed delivery and false advertising.

Liu Jiaxiu, a deputy to the municipal legislative body, said the sector is sorely in need of more control.

"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.