This is the Noto Sans Simplified Chinese family. It has Thin, Light, Regular, Medium, Bold and Black styles.

notosanssc.css

/*
* Noto Sans SC (Chinese Simplified) http://www.google.com/fonts/earlyaccess
 */
@font-face {
  font-family: 'Noto Sans SC';
  font-style: normal;
  font-weight: 100;
  src: url(//fonts.gstatic.com/ea/notosanssc/v1/NotoSansSC-Thin.woff2) format('woff2'),
       url(//fonts.gstatic.com/ea/notosanssc/v1/NotoSansSC-Thin.woff) format('woff'),
       url(//fonts.gstatic.com/ea/notosanssc/v1/NotoSansSC-Thin.otf) format('opentype');
}
@font-face {
  font-family: 'Noto Sans SC';
  font-style: normal;
  font-weight: 300;
  src: url(//fonts.gstatic.com/ea/notosanssc/v1/NotoSansSC-Light.woff2) format('woff2'),
       url(//fonts.gstatic.com/ea/notosanssc/v1/NotoSansSC-Light.woff) format('woff'),
       url(//fonts.gstatic.com/ea/notosanssc/v1/NotoSansSC-Light.otf) format('opentype');
}
@font-face {
   font-family: 'Noto Sans SC';
   font-style: normal;
   font-weight: 400;
   src: url(//fonts.gstatic.com/ea/notosanssc/v1/NotoSansSC-Regular.woff2) format('woff2'),
        url(//fonts.gstatic.com/ea/notosanssc/v1/NotoSansSC-Regular.woff) format('woff'),
        url(//fonts.gstatic.com/ea/notosanssc/v1/NotoSansSC-Regular.otf) format('opentype');
 }
@font-face {
   font-family: 'Noto Sans SC';
   font-style: normal;
   font-weight: 500;
   src: url(//fonts.gstatic.com/ea/notosanssc/v1/NotoSansSC-Medium.woff2) format('woff2'),
        url(//fonts.gstatic.com/ea/notosanssc/v1/NotoSansSC-Medium.woff) format('woff'),
        url(//fonts.gstatic.com/ea/notosanssc/v1/NotoSansSC-Medium.otf) format('opentype');
 }
@font-face {
   font-family: 'Noto Sans SC';
   font-style: normal;
   font-weight: 700;
   src: url(//fonts.gstatic.com/ea/notosanssc/v1/NotoSansSC-Bold.woff2) format('woff2'),
        url(//fonts.gstatic.com/ea/notosanssc/v1/NotoSansSC-Bold.woff) format('woff'),
        url(//fonts.gstatic.com/ea/notosanssc/v1/NotoSansSC-Bold.otf) format('opentype');
 }
@font-face {
   font-family: 'Noto Sans SC';
   font-style: normal;
   font-weight: 900;
   src: url(//fonts.gstatic.com/ea/notosanssc/v1/NotoSansSC-Black.woff2) format('woff2'),
        url(//fonts.gstatic.com/ea/notosanssc/v1/NotoSansSC-Black.woff) format('woff'),
        url(//fonts.gstatic.com/ea/notosanssc/v1/NotoSansSC-Black.otf) format('opentype');
 }