I find this weird, but I worked in a field that had a lot of Australians of varying backgrounds, including from varying parts of China and south-east Asia.

I admit that I am terrible at guessing age in people, particularly people from countries with less sun exposure than is common here. 70 year old English men look to be in their 40-50s to me, and I rely heavily on other cues between about 25-65 most of the time.