China’s top internet watchdog said on Friday tech giants such as Tencent Holdings and Alibaba Group have submitted details of algorithms used in some of their products, complying with a drive by authorities to tighten oversight of platform algorithms. The rules are part of a broad regulatory crackdown by Beijing against its once free-wheeling technology sector. State media had accused internet platforms of using algorithms to invade user privacy and influencing their choices. The Cyberspace Administration of China (CAC) published a list of 30 algorithms used in some of the country’s most popular apps, including Alibaba’s Taobao Tencent’s Wechat Meituan...