China's Ministry of Transport on Monday summoned 11 online ride-hailing platforms, urging them to review and rectify their business operations after the government identified several problems.

The issues include infringement of the legitimate rights and interests of employees and passengers, as well as hiding security risks, according to a statement published by the ministry.

Major domestic ride-hailing platforms including DiDi Chuxing, Gaode and Caocao Chuxing are among the companies that were summoned.

The transport ministry said they found those problems through various means, including industry monitoring, calls and letters from the public and media reports.

The ride-hailing platforms were asked to conduct "in-depth investigation and rectification" of their potential stability risks and strengthen operational safety management, according to the statement.

Last month, China wrapped up a one-year probe into DiDi Global for violating user privacy. The Beijing-based company was fined 8.026 billion yuan ($1.19 billion) and its CEO Cheng Wei and president Liu Qing were each fined 1 million yuan.

According to the Cyberspace Administration of China, DiDi illegally processed a massive amount of over 64 billion pieces of personal information.

In February, China's revised cybersecurity review rules took effect, requiring online platforms handling personal information of more than one million users to undergo a cybersecurity review before seeking initial public offerings (IPOs) in a foreign country.