Chinese regulators ordered the removal of 25 apps owned by Didi Global, China’s largest ride-hailing service, from the app store, citing serious violations of regulations governing the collection of personal data.

After listing on the U.S. stock market last week, the China Cyberspace Administration of China took down the main Didi app last Sunday, awaiting a cyber security review.

The 25 new apps include Didi Enterprise and apps designed for Didi drivers. A Didi spokesperson did not immediately respond to a request for comment.

The move came after Chinese authorities said earlier this week that they would strengthen supervision of overseas listed companies. The new measures will strengthen data security supervision and cross-border data flow, as well as the management of confidential data.

Didi is the latest company to face censorship by the Chinese government. Internet regulators said earlier this week that an investigation found a “serious violation” in the way Didi collects and uses personal information. A statement said the company was told to “correct the problem” but did not provide details.

Internet regulators also stated that Didi was banned from accepting new customers until the investigation was completed.

Founded in 2012, Didi was originally a ride-hailing app, but has now expanded to other ride-hailing services, including private cars and buses. It also stated that it is also investing in electric vehicles, artificial intelligence and other technological development.

Didi raised $4 billion from investors in its New York stock offering.

The ruling Communist Party last year began to strengthen its control of China’s rapidly changing Internet industry, launching antitrust and other investigations. Earlier this year, the authorities imposed a record fine of US$2.8 billion on Alibaba for violating antitrust laws and launched an investigation into food delivery platform Meituan for suspected monopolistic behavior.

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On Saturday, Chinese market regulators blocked the merger of Tencent-backed video game live broadcast platforms Huya and Douyu following an antitrust investigation.