Chinese and English characters cannot display under Linux Steam games in CS:Source

It happens only on Counter Strike,but OK on others like CS:go and dota2 etc.I am just wondering whether it is because of a lack font or anything else? If yes, which font shall I install?
http://imgsrc.baidu.com/forum/w%3D580/sign=39e85cdddb54564ee565e43183dc9cde/48c12a381f30e924c825fcff4a086e061f95f740.jpg