原來 unicode 定義左一堆幾複雜既表情符號
http://www.unicode.org/charts/PDF/U1F600.pdf
To enter a unicode character directly on your Ubuntu system do the following:
Press [Ctrl]-[Shift]-[u]
Enter the unicode hex code of the character you want to type
Press [Space] or [Enter] to confirm your input.
ĥ1F60 ὠ😀 😁
