Such virtual makeovers, typically involving lightening skin, smoothing out complexions and rounding the eyes, have propelled selfie-editing app Meitu to the top ranks of China downloads.
With more than 450 million active China users, Meitu is now also gaining traction abroad, using its more advanced features to challenge Instagram and Snapchat, which depend largely on filters and stickers.
China has a world-leading 700 million mobile-Internet users, vast numbers of whom use such apps to fuss over their digital appearance.
She added: "Everyone uses it as a kind of personal advertisement."
Meitu, which means "pretty picture", launched a Hong Kong IPO in December that valued the company at $4.6 billion at the time, despite consistently posting losses.
It was Hong Kong's biggest tech IPO in nearly a decade.
Analysts call Meitu a potential test case of the global potential of Chinese apps, particularly those aimed at women, a powerful consumer force.
"Photo-sharing is a global phenomenon but China has climbed to the top of the world in this," he added.
The selfie-editing craze highlights how Chinese lives are increasingly lived online, making a person's virtual appearance as important as their real one, said psychology professor Yu Feng of Xi'an Jiaotong University.
"Modern society has turned face-to-face communication into mostly internet communication," Yu said, and Chinese millennials are seizing the chance "to control themselves and their world".
Founded in the eastern city of Xiamen, Meitu initially provided photo-editing software for PCs, introducing its first selfie app in 2013.
Its IPO prospectus said Meitu apps process half of the pictures posted on Chinese social media and were used to alter around six billion photos last October.
Its half-dozen applications, including one for altering video, are regularly among the top photo-app downloads in countries as diverse as China, Russia, Japan, India and Malaysia.
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