Analysts said the regulations were largely anticipated by the industry and unlikely to hurt revenue. Many of the biggest technology companies, including Tencent and Netease, have already imposed limits on younger users.
Young gamers are also likely to find ways around the regulations, such as using a parent’s phone and identification number.
“There are always going to be loopholes,” said Daniel Ahmad, a senior analyst at Niko Partners, a research and consulting firm.
But Mr. Ahmad added that China is now one of the most heavily regulated video game markets in the world, and that technology companies in the country and abroad would be forced to more closely follow the government’s policy announcements.
“I think compared to the West, it’s very extreme,” he said. “Publishers and developers need to be very aware of the content of the games they are developing for the market.”
In a sign of the growing global importance of the Chinese gaming market, Activision Blizzard, an American company, recently suspended an e-sports player who had voiced support for antigovernment demonstrations in Hong Kong during a live broadcast, a move that was seen as a concession to Beijing.
The rules were greeted skeptically by some parents and gamers.
Yang Bingben, 35, the owner of an industrial technology firm in eastern China, said he worried that many children would still find ways to play video games. For example, he noted that his 7-year-old son often played games that do not require an internet connection and were difficult to regulate.
“We have to develop new things to replace games,” he said. “Our minds should be focused on building more stadiums, football courts and basketball courts.”
Wang Yiwei contributed research.