Alibaba Group Holding, Tencent Holdings and ByteDance are among 33 Chinese tech companies that have collectively signed an agreement on antitrust self-discipline amid Beijing’s growing regulatory pressure on Big Tech. The group of tech companies, which also includes Huawei Technologies Co, Baidu, JD.com and artificial intelligence company iFlyTek, gathered at the China Internet Conference in Beijing on Tuesday and signed the convention on fair competition, consumer protection and strengthening innovation, according to a statement on the Internet Society of China, the conference organiser. The Internet Platform Operators Anti-Monopoly Self-discipline Convention bars tech companies from engaging in different types of monopolies, including “ picking one out of two ”, a practice in the e-commerce sector whereby merchants were forced to choose only one platform as their exclusive distribution channel, an issue at the centre of the Alibaba antitrust investigation. Alibaba, the owner of the South China Morning Post , was fined 18.2 billion yuan (US$2.82 billion) in April for monopolistic behaviours, while online services giant Meituan is still under an antitrust investigation. Antitrust regulator SAMR is now the sheriff of China’s Big Tech The convention was drafted by tech companies and the Intellectual Property Centre of the Chinese Academy of Information and Communications Technology (CAICT). During the event, the tech firms were awarded a plate by the Ministry of Industry and Information Technology (MIIT) and the Internet Society of China in recognition of their service. China’s antitrust authority, the State Administration for Market Regulation (SAMR), has been increasing its scrutiny of Big Tech since late 2020 when the Chinese leadership signalled the sector needed to be brought to heel. Beijing issued a long term action plan in February promising to improve the regulatory framework to break monopolies among online platforms, regulate the collection of user data and protect consumer rights. That same month it issued the final version of the country’s new antitrust guidelines targeting internet platforms. This month, China’s antitrust watchdog also blocked Tencent’s planned merger of its two units Huya and Douyu International Holdings, China’s two biggest video game live-streaming platforms, dealing a blow to the world’s biggest games publisher.