Police said about 520,000 bikes had been put on the streets in the city in just a year since bike sharing began.
Police condemned the rioters for hijacking a public event and committing violent acts.
Pinduoduo shares sank 18 percent on Wednesday after the losses were announced.
Police are also urged to intensify their crackdown on the crimes of producing and selling fake and shoddy condiments, tobacco, alcohol, beverages and local food, and crimes concerning illegal health food-related additives, fraud and misleading advertising, the circular says.
Police across the country to date have busted 1,664 criminal gangs involved in loan scams, arrested 16,349 suspects, cracked 21,624 cases of fraud, extortion and false litigation, and seized more than 3.53 billion yuan (0 million) in assets involved, according to the ministry.
Police in China and Vietnam have joined hands to break up a major cross-border armed drug trafficking ring and have detained a drug lord from Vietnam, according to the Ministry of Public Security on Thursday.
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Photo taken on Feb 16, 2018 shows a view of Muyanza Dam built by China Geo-Engineering Corporation (CGC) in Rulindo District, Northern Province of Rwanda. The recently completed Muyanza Dam is the second highest in Rwanda and the country's highest and largest earth fill dam in the agriculture sector. It will benefit farmers and help grow crops for exports, a Rwandan official said on Thursday. [Photo/Xinhua]
Police officers stand by during the investigation of a triple shooting on Tuesday morning, April 18, 2017 in Fresno, California, US. [Photo/VCG]
Pocock said she hoped this might be the start of a bright future for the world of illuminations in the UK.
Phyllis Cheung, CEO of McDonald's China, speaks at the annual McBanquet event on Friday. [Photo provided to chinadaily.com.cn]