Age: 25

Actress-singer Rui En

Even at this age, lines start appearing around the eyes and laugh lines around the mouth. Uneven pigmentation may occur if you are in the sun without sufficient sunblock protection.

Age: 31
Taiwanese actress Shu Qi

Skin continues to loosen and possibly sag. If you are considering non-invasive and minimally invasive procedures, now is a good time, says cosmetic surgeon Andrew Khoo of Aesthetic & Reconstructive Centre, as these "work best when the skin is just beginning to show early signs of ageing".

Age: 36
Actress Pan Lingling

Bags develop under the eyes and lines around the neck - a very neglected area, says Dr Georgia Lee of TLC Clinic - start to form.

Age: 42
Hong Kong actress Maggie Cheung

Deeper wrinkles start to set in, especially if you have dry skin or prolonged exposure to harmful, ultraviolet rays of the sun.

Age: 50
Taiwanese singer, Tsai Chin

More wrinkles appear. Laugh lines and crow?s feet intensify while skin continues to sag and get duller in appearance. Applying products rich in vitamin A or retinol will help plump up lines and wrinkles.

Age: 57
Veteran Hong Kong actress Nancy Sit

Pigmentation, wrinkles, sagging skin - you name it, you?ve probably got it. Dr Patricia Yuen, consultant dermatologist at Pacific Healthcare Specialist Centre, suggests non-invasive procedures targeted at stimulating collagen under the skin?s surface, which will help lift sagging skin and smooth out wrinkles.

Age: 62
Aung San Suu Kyi, Burmese leader of the National League for Democracy in Myanmar

Melasma - a dark discolouration - is a common skin disorder that affects older women. Chemical peels remain one of the best remedies for pigmentation.