<http://schema.org/keywords>
"\u4E0D\u5982\u4EE5\u524D\u4E86,thinkpad,thinkpad\u505A\u5DE5\u5927\u4E0D\u5982\u4EE5\u524D"^^<http://www.w3.org/2001/XMLSchema#string>
<https://catfan.me/yichun2014/p175058>