Can YOU tell how old she is? Super-fit mother looks so young people think her 22-year-old son is her boyfriend

Liu Yelin got her first job in 1985, aged 17.

More than three decades later, the ex-librarian, who has already retired, doesn't look much older.

With glowing skin, a super-toned body and not a single wrinkle in sight, China-born Ms Liu has stunned millions of people with her incredibly youthful looks.

Can you believe she's nearly 50? Liu Yelin, from China, rose to fame for her youthful looks

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Can you believe she's nearly 50? Liu Yelin, from China, rose to fame for her youthful looks

Stay active: The woman, 49, said many people wouldn't believe her when she revealed her age

Stay active: The woman, 49, said many people wouldn't believe her when she revealed her age

After posting her pictures on social media, Ms Liu has got 75,000 followers

Ms Liu said she liked looking pretty from a very early age

Social media star: After posting her pictures on Weibo, Ms Liu has got 75,000 followers

Not a couple: Ms Liu (pictured with her son) said she's often mistaken for her son's girlfriend

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Not a couple: Ms Liu (pictured with her son) said she's often mistaken for her son's girlfriend

Proud mother: Ms Liu said he son, 22, works as an assistant at a film production company

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Proud mother: Ms Liu said he son, 22, works as an assistant at a film production company