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"Google does little to police those developers, who train their computers ... to read their users' emails," though Google vowed a year ago to stop its computers from scanning the inboxes of Gmail users for information to personalize advertisements, the WSJ said.

"Following restrictions placed on Huawei, a group of Chinese tech companies have been devoted to ensuring a sustainable supply chain and continued innovation efforts," said Xiang Ligang, director-general of telecom industry association the Information Consumption Alliance.

"For example, WeChat's strong functionalities can meet one's daily needs without leaving the app, but that level of user engagement (of Douyin) allows it to bypass bigger rivals' platforms," said Liu Dingding, a veteran internet analyst in Beijing.

"For example, despite industry signing up to self-regulation in Australia, children and adolescent viewers were still exposed to 51 million alcohol ads during just one year of televised football, cricket and rugby. And the reality could be much worse still: we have few facts and figures about the huge expansion of social media advertising and algorithms aimed at our children."

"For products like this, it requires the founder to have a long-term vision and a strong team. Baijiu may be aging, but fresh demand from young consumers is emerging."