China will forbid minors from gaming more than three hours most weeks, a dramatic escalation of restrictions which dealt a blow to the world’s largest mobile gaming market, as Beijing signaled it would continue a campaign to control the expansion of large tech companies. Gaming platforms from Tencent Holdings Ltd. to NetEase Inc. can henceforth only offer online gaming to minors from 8 p.m. to 9 p.m. on Fridays, weekends and public holidays, state news agency Xinhua reported, citing a notice by the National Press and Publication Administration. Explore SEPTEMBER 2020: 5 key issues straining U.S. relations with China The...