cwTeXKai font (Chinese: 楷體) is derived from the cwTeX Traditional Chinese Type 1 fonts made by Tsong-Min Wu, Tsong-Huey Wu and Edward G.J. Lee.

cwtexkai.css

/*
 * cwTeXKai (Chinese Traditional) http://www.google.com/fonts/earlyaccess
 */
@font-face {
  font-family: 'cwTeXKai';
  font-style: normal;
  font-weight: 500;
  src: url(//fonts.gstatic.com/ea/cwtexkai/v3/cwTeXKai-zhonly.eot);
  src: url(//fonts.gstatic.com/ea/cwtexkai/v3/cwTeXKai-zhonly.eot?#iefix) format('embedded-opentype'),
       url(//fonts.gstatic.com/ea/cwtexkai/v3/cwTeXKai-zhonly.woff2) format('woff2'),
       url(//fonts.gstatic.com/ea/cwtexkai/v3/cwTeXKai-zhonly.woff) format('woff'),
       url(//fonts.gstatic.com/ea/cwtexkai/v3/cwTeXKai-zhonly.ttf) format('truetype');
}