三年 (San Nien, Three Years) is a song in the film, "Unforgettable Night", released by Shaw Brothers in1958, starring and singing Li Xiang Lan. 三年 was made famous by Li Xiang Lan. Later, many singers sang this song such as Teresa Teng (鄧麗君), Cai Xing Juan (蔡幸娟), Tsai Chin (蔡琴), etc.
The lyrics refered to waiting for her lover for three years.
李雋清 composed lyrics
姚敏 composed melody.
If you build your family tree and connect it to your relatives' family trees like fitting pieces of jigsaw together,
you will get a perfect big family tree which you and your relatives can share to get to know one another although they live in different cities or different countries
because the family tree explains clearly who is who.