China announced on Monday that it would investigate two other Chinese companies listed in the United States, a day after it banned Didi, the chauffeur-driven car giant, from accessing app stores.

For about a year, the authorities launched a regulatory offensive against large internet companies in China to try to curb their influence.

The recent actions affect two companies that went public, Full Truck Alliance – a merger of transportation platforms Yunmanman and Huochebang – and Kanzhun, owner of job search platform Boss Zhipin.

The Cyberspace Administration indicated that the three platforms were ordered to stop registering new users during the investigation period, in order to “avoid risks to national data security, protect national security and protect the public interest.”

A few hours ago, the watchdog ordered Didi removed from the app stores for a similar investigation.

This action is a setback for the company’s growth planswhich went public last week in New York and raised more than $4.4 billion.

Didi has nearly 500 million users and 15 million drivers.

The administration issued the order after investigations revealed that the collection and use of user data constituted a “serious breach” of regulations.

State media praised the measure.

“We should not allow any Internet giant to become a super-database of the personal information of the Chinese, even more detailed than that of the country, let alone give them the right to use this data as they like,” the newspaper said. Global Times.

Last year, Chinese authorities suspended the multi-million dollar initial public offering of Ant Group, Alibaba’s financial arm, and then launched an antitrust investigation with the tech giant.