The big seal script of character Open is
The small seal script of the character is
The clerical script of the character is
The song typeface for traditional character Open is
Same as its clerical script.
The song typeface of the simplified character is
Which is the inside of the traditional character. However because the misleading of this part as I mentioned above, most experts are confused on this character, why the two horizontal bars are connected for open? I have just figured out after many years confusion.
Its Pinyin is Kai1.