Despite the serious nature of the subject, Yang’s daughtertries to show the fun and loving moments the two share. She said she only posts about happy moments and deliberately avoids sharing the hardship in her work because she wants to show her mother’s clean, healthy and joyful side in her old age.

Li has spent the past six years looking after Yang round the clock and has won widespread applause for her patience and good care of the centenarian.

Her videos have received over 36 million likes in total so far.

Yang, who suffers severe memory loss and confusion, became widely known after a video of her calling her daughter “mum” last year struck a chord with many online users.

“It is unfortunate that Granny Yang has this disease, but she is also lucky to be so well looked after. Just be your daughter’s child, Granny Yang,” one person said online.

Li, who prepares meals for her mother, takes her to the park during the day and sleeps beside her at night, saying she is just doing what a child should do.

“My mother raised me when I was young, and I care for her when she is old. This is happiness as I understand,” said Li, who always calls Yang “old baby”.

Adult children in China are traditionally expected to take care of their ageing parents. However, elderly care is becoming an increasing public concern as China ages, and it becomes more challenging to care for elderly folks on a large scale.

While the country’s elderly care still relies mainly on families today, a growing number of young people no longer always look after their old parents for various reasons, such as they live far away in cities or no longer place tradition at a high value.

More than 15 million Chinese people aged 60 and above suffer from dementia, including 10 million from Alzheimer’s, a disease that gradually destroys memory and other important mental functions, according to the National Health Commission.