In web and mobile frontend development, developers often want to use non-system fonts, which are typically in TTF, OTF, and other formats.

English fonts are usually quite small, but Chinese fonts can range from 1-2 MB on the small end to over 10 MB for larger ones. This is unacceptable for web or mobile applications. This is where font subsetting comes in – you only need the specific characters used in a particular frontend interface, so you export just those characters from the font into a new TTF file, leaving out the unnecessary ones.

I highly recommend a Chinese font subsetting tool: TTF Font Library Subsetting and Conversion Tool

Download link: http://pan.baidu.com/s/1skI7FiP Password: qb27

Note that the target font to be subsetted must first be installed in the Windows system.