twitter card not working

hi~
I can see the source code working right on my site, but the twitter card not working when share the post(or site) link with twitter/facebook.
I need your assistant, plz reply me, thanks~

<!-- START - Facebook Open Graph, Google+ and Twitter Card Tags 2.2.3.1 -->
 <!-- Facebook Open Graph -->
  <meta property="og:locale" content="zh_CN"/>
  <meta property="og:site_name" content="小山豆读书会"/>
  <meta property="og:title" content="《你是人间四月天》（林徽因） epub+mobi+azw3"/>
  <meta property="og:url" content="https://xiaoshandou.com/changxiao/%e3%80%8a%e4%bd%a0%e6%98%af%e4%ba%ba%e9%97%b4%e5%9b%9b%e6%9c%88%e5%a4%a9%e3%80%8b%ef%bc%88%e6%9e%97%e5%be%bd%e5%9b%a0%ef%bc%89-epubmobiazw3.html"/>
  <meta property="og:type" content="article"/>
  <meta property="og:description" content="内容简介
《你是人间四月天》以梁从诫编纂的《林徽因集》、《新月诗选》等为编辑底本，精心挑选、收录最能突显其性格气质的散文7篇，包括《悼志摩》《窗子以外》等；小说6篇，包括《九十九度中》《窘》等；译文"/>
  <meta property="og:image" content="https://xiaoshandou.com/wp-content/uploads/2018/02/《你是人间四月天》（林徽因）-epubmobiazw3.jpg"/>
  <meta property="article:published_time" content="2018-02-05T13:41:17+00:00"/>
  <meta property="article:modified_time" content="2018-02-05T13:45:10+00:00" />
  <meta property="og:updated_time" content="2018-02-05T13:45:10+00:00" />
  <meta property="article:section" content="畅销图书"/>
  <meta property="article:section" content="经典名著"/>
 <!-- Google+ / Schema.org -->
 <!-- Twitter Cards -->
  <meta name="twitter:title" content="《你是人间四月天》（林徽因） epub+mobi+azw3"/>
  <meta name="twitter:url" content="https://xiaoshandou.com/changxiao/%e3%80%8a%e4%bd%a0%e6%98%af%e4%ba%ba%e9%97%b4%e5%9b%9b%e6%9c%88%e5%a4%a9%e3%80%8b%ef%bc%88%e6%9e%97%e5%be%bd%e5%9b%a0%ef%bc%89-epubmobiazw3.html"/>
  <meta name="twitter:description" content="内容简介
《你是人间四月天》以梁从诫编纂的《林徽因集》、《新月诗选》等为编辑底本，精心挑选、收录最能突显其性格气质的散文7篇，包括《悼志摩》《窗子以外》等；小说6篇，包括《九十九度中》《窘》等；译文"/>
  <meta name="twitter:image" content="https://xiaoshandou.com/wp-content/uploads/2018/02/《你是人间四月天》（林徽因）-epubmobiazw3.jpg"/>
  <meta name="twitter:card" content="summary_large_image"/>
 <!-- SEO -->
  <meta name="author" content="嘟嘟"/>
  <meta name="publisher" content="小山豆读书会"/>
 <!-- Misc. tags -->
 <!-- is_singular -->
<!-- END - Facebook Open Graph, Google+ and Twitter Card Tags 2.2.3.1 -->
	

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