diff --git a/functions.php b/functions.php
index d09030a..50712da 100644
--- a/functions.php
+++ b/functions.php
@@ -135,6 +135,13 @@ function my_enqueue_scripts() {
  }
  add_action( 'wp_enqueue_scripts', 'my_enqueue_scripts', 1 );
 
+//加速 Gravatar 头像
+function replace_gravatar($avatar) {
+	$avatar = str_replace(array("//gravatar.com/", "//secure.gravatar.com/", "//www.gravatar.com/", "//0.gravatar.com/", "//1.gravatar.com/", "//2.gravatar.com/", "//cn.gravatar.com/"), "//cdn.v2ex.com/gr", $avatar);
+	return $avatar;
+}
+add_filter( 'get_avatar', 'replace_gravatar' );
+
 //来自知更鸟的评论带图
 add_action('comment_text', 'comments_embed_img', 2);
 function comments_embed_img($comment) {
@@ -168,4 +175,14 @@ function mail_smtp( $phpmailer ) {
 	$phpmailer->IsSMTP();
 }
 
+//修改每页显示的文章数
+function custom_posts_per_page($query){
+	if(is_home()){
+		$query->set('posts_per_page',get_RnMaterial('posts_num','5'));//首页每页显示8篇文章
+	}
+	if(is_search()){
+		$query->set('posts_per_page',-1);//搜索页显示所有匹配的文章，不分页
+	}
+}
+add_action('pre_get_posts','custom_posts_per_page');
 ?>
diff --git a/img/random/material-1.png b/img/random/material-1.png
new file mode 100644
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diff --git a/img/random/material-10.png b/img/random/material-10.png
new file mode 100644
index 0000000..b08eeef
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diff --git a/img/random/material-11.png b/img/random/material-11.png
new file mode 100644
index 0000000..49afebe
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diff --git a/img/random/material-12.png b/img/random/material-12.png
new file mode 100644
index 0000000..4b4d694
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diff --git a/img/random/material-13.png b/img/random/material-13.png
new file mode 100644
index 0000000..2298964
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diff --git a/img/random/material-14.png b/img/random/material-14.png
new file mode 100644
index 0000000..6dbaf87
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diff --git a/img/random/material-15.png b/img/random/material-15.png
new file mode 100644
index 0000000..33c0cfd
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diff --git a/img/random/material-16.png b/img/random/material-16.png
new file mode 100644
index 0000000..0fe201b
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diff --git a/img/random/material-17.png b/img/random/material-17.png
new file mode 100644
index 0000000..cf7139e
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diff --git a/img/random/material-18.png b/img/random/material-18.png
new file mode 100644
index 0000000..01742e3
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diff --git a/img/random/material-19.png b/img/random/material-19.png
new file mode 100644
index 0000000..2fecb79
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diff --git a/img/random/material-2.png b/img/random/material-2.png
new file mode 100644
index 0000000..49f0a5f
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diff --git a/img/random/material-3.png b/img/random/material-3.png
new file mode 100644
index 0000000..a4a7cca
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diff --git a/img/random/material-4.png b/img/random/material-4.png
new file mode 100644
index 0000000..aa849aa
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diff --git a/img/random/material-5.png b/img/random/material-5.png
new file mode 100644
index 0000000..6c2c58b
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diff --git a/img/random/material-6.png b/img/random/material-6.png
new file mode 100644
index 0000000..a3f2a1f
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diff --git a/img/random/material-7.png b/img/random/material-7.png
new file mode 100644
index 0000000..1919fcb
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diff --git a/img/random/material-8.png b/img/random/material-8.png
new file mode 100644
index 0000000..18f7da3
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diff --git a/img/random/material-9.png b/img/random/material-9.png
new file mode 100644
index 0000000..e2779f4
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diff --git a/img/sidebar.jpg b/img/sidebar.jpg
index d5dcd1d..0b108f7 100644
Binary files a/img/sidebar.jpg and b/img/sidebar.jpg differ
diff --git a/index.php b/index.php
index 73f4d8e..c4d123a 100644
--- a/index.php
+++ b/index.php
@@ -1,4 +1,6 @@
 <?php get_header(); ?>
+<?php $count_posts = wp_count_posts(); $published_posts = $count_posts->publish;?>
+<?php $post_nn = get_RnMaterial("posts_num","5"); ?>
 <body id="scheme-Paradox" class="lazy">
   <div class="material-layout mdl-js-layout has-drawer is-upgraded">
     <main class="material-layout__content" id="main">
@@ -61,7 +63,7 @@
                 
                 <?php if(have_posts()) : ?><?php while(have_posts()) : the_post(); ?>
                   <div class="post_entry-module mdl-card mdl-shadow--2dp mdl-cell mdl-cell--12-col fade out">
-                    <div class="post_thumbnail-custom mdl-card__media mdl-color-text--grey-50 lazy" style="background-image:url(<?php $img_src = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), "Full");echo $img_src[0]; ?>)">
+                    <div class="post_thumbnail-custom mdl-card__media mdl-color-text--grey-50 lazy" style="background-image:url(<?php $img_src = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), "Full");if($img_src){echo $img_src[0];}else{$rann=rand(1,19);echo get_bloginfo('template_url').'/img/random/material-'.$rann.'.png';}; ?>)">
                       <p class="article-headline-p">
                         <a href="<?php the_permalink();?>"><?php the_title();?></a></p>
                       </div>
@@ -84,22 +86,12 @@
                         <?php endwhile; ?>
                       <?php endif; ?>
                       
+                      <?php if($published_posts>$post_nn){ ?>
                       <nav class="nav-body">
                         <div class="nav-next"><?php next_posts_link(__('<i class="material-icons sidebar-material-icons">navigate_before</i>')) ?></div>
                         <div class="nav-prev"><?php previous_posts_link(__('<i class="material-icons sidebar-material-icons">navigate_next</i>')) ?></div>
                       </nav>
-                      <script type="text/ls-javascript" id="thumbnail-script">var randomNum;
-
-                        var locatePost = $('.locate-thumbnail-symbol').next();
-                        for (var i = 0; i < 5; i++) {
-                        randomNum = Math.floor(Math.random() * 19 + 1);
-
-                        locatePost.children('.post_thumbnail-random').attr('id', 'random_thumbnail-' + randomNum);
-                        locatePost.children('.post_thumbnail-random').attr('data-original', 'https://materialcdn.b0.upaiyun.com/img/random/material-' + randomNum + '.png');
-                        $('.post_thumbnail-random').addClass('lazy');
-
-                        locatePost = locatePost.next();
-                      }</script>
+                      <?php }; ?>
                     </div>
                     <?php get_template_part( 'nav', 'index' ); ?>
                   </div>
diff --git a/options.php b/options.php
index 217c236..09462ed 100644
--- a/options.php
+++ b/options.php
@@ -98,6 +98,15 @@ function optionsframework_options() {
 		'type' => 'heading'
 	);
 
+	$options[] = array(
+		'name' => __( '首页显示文章数', 'theme-textdomain' ),
+		'desc' => __( '请输入整数，不要留空，留空时<b>默认为 5</b>', 'theme-textdomain' ),
+		'id' => 'posts_num',
+		'std' => '5',
+		'class' => 'mini',
+		'type' => 'text'
+	);
+
 	$options[] = array(
 		'name' => __( '背景颜色', 'theme-textdomain' ),
 		'desc' => __( '请输入 RGB 值，不要留空，留空时背景纯白。<b>默认为 #dedede</b>', 'theme-textdomain' ),
diff --git a/page.php b/page.php
index c5f2de2..513112d 100644
--- a/page.php
+++ b/page.php
@@ -10,7 +10,7 @@
         <div class="material-post mdl-grid">
           <div class="mdl-card mdl-shadow--4dp mdl-cell mdl-cell--12-col">
             <?php if (have_posts()) : while (have_posts()) : the_post(); ?>
-            <div class="post_thumbnail-custom mdl-card__media mdl-color-text--grey-50" style="background-image:url(<?php $img_src = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), "Full");echo $img_src[0]; ?>)">
+            <div class="post_thumbnail-custom mdl-card__media mdl-color-text--grey-50" style="background-image:url(<?php $img_src = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), "Full");if($img_src){echo $img_src[0];}else{$rann=rand(1,19);echo get_bloginfo('template_url').'/img/random/material-'.$rann.'.png';}; ?>)">
               <p class="article-headline-p"><?php the_title();?></p></div>
               <div class="mdl-color-text--grey-700 mdl-card__supporting-text meta">
                 <div id="author-avatar">
diff --git a/pages/page-archieve.php b/pages/page-archieve.php
index c13405e..fea00d0 100644
--- a/pages/page-archieve.php
+++ b/pages/page-archieve.php
@@ -17,7 +17,7 @@
           <div class="material-post mdl-grid">
             <div class="mdl-card mdl-shadow--4dp mdl-cell mdl-cell--12-col">
 			<?php if (have_posts()) : while (have_posts()) : the_post(); ?>
-              <div class="post_thumbnail-custom mdl-card__media mdl-color-text--grey-50" style="background-image:url(<?php $img_src = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), "Full");echo $img_src[0]; ?>)">
+              <div class="post_thumbnail-custom mdl-card__media mdl-color-text--grey-50" style="background-image:url(<?php $img_src = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), "Full");if($img_src){echo $img_src[0];}else{$rann=rand(1,19);echo get_bloginfo('template_url').'/img/random/material-'.$rann.'.png';}; ?>)">
                 <p class="article-headline-p"><?php the_title();?></p></div>
               <div class="mdl-color-text--grey-700 mdl-card__supporting-text meta">
                 <div id="author-avatar">
diff --git a/pages/page-links.php b/pages/page-links.php
index a218b76..5676da2 100644
--- a/pages/page-links.php
+++ b/pages/page-links.php
@@ -15,7 +15,7 @@
         <div class="material-post mdl-grid">
           <div class="mdl-card mdl-shadow--4dp mdl-cell mdl-cell--12-col">
             <?php if (have_posts()) : while (have_posts()) : the_post(); ?>
-            <div class="post_thumbnail-custom mdl-card__media mdl-color-text--grey-50" style="background-image:url(<?php $img_src = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), "Full");echo $img_src[0]; ?>)">
+            <div class="post_thumbnail-custom mdl-card__media mdl-color-text--grey-50" style="background-image:url(<?php $img_src = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), "Full");if($img_src){echo $img_src[0];}else{$rann=rand(1,19);echo get_bloginfo('template_url').'/img/random/material-'.$rann.'.png';}; ?>)">
               <p class="article-headline-p"><?php the_title();?></p></div>
               <div class="mdl-color-text--grey-700 mdl-card__supporting-text meta">
                 <div id="author-avatar">
diff --git a/search.php b/search.php
index 3cb4f79..3805f5a 100644
--- a/search.php
+++ b/search.php
@@ -22,7 +22,7 @@
 							<div id="post_entry-info">
 								<div id="post_entry-left-info" class="mdl-card__supporting-text meta mdl-color-text--grey-600">
 									<div id="author-avatar">
-										<img src="<?php echo bloginfo('template_url');?>/img/avatar.png" width="44px" height="44px" alt="neoFelhz's avatar"></div>
+                						<?php echo get_avatar(1,32,avatar); ?></div>
 										<div>
 											<strong><?php the_author(); ?></strong>
 											<span><?php the_time('M d, Y')?></span></div>
diff --git a/single.php b/single.php
index aaf3626..bf893d7 100644
--- a/single.php
+++ b/single.php
@@ -10,7 +10,7 @@
         <div class="material-post mdl-grid">
           <div class="mdl-card mdl-shadow--4dp mdl-cell mdl-cell--12-col">
            <?php if (have_posts()) : while (have_posts()) : the_post(); ?>
-            <div class="post_thumbnail-custom mdl-card__media mdl-color-text--grey-50" style="background-image:url(<?php $img_src = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), "Full");echo $img_src[0]; ?>)">
+            <div class="post_thumbnail-custom mdl-card__media mdl-color-text--grey-50" style="background-image:url(<?php $img_src = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), "Full");if($img_src){echo $img_src[0];}else{$rann=rand(1,19);echo get_bloginfo('template_url').'/img/random/material-'.$rann.'.png';}; ?>)">
               <p class="article-headline-p"><?php the_title();?></p></div>
               <div class="mdl-color-text--grey-700 mdl-card__supporting-text meta">
                 <div id="author-avatar">
diff --git a/style.css b/style.css
index 6918424..ae296d9 100644
--- a/style.css
+++ b/style.css
@@ -1,10 +1,10 @@
 /*
 Theme Name: RnMaterial
-Theme URI: https://jakting.com
+Theme URI: https://github.com/hjthjthjt/rnmaterial
 Author: Jartip Hwang
 Author URI: https://jakting.com
 Description: Maybe it is the best Material Design WordPress Theme. This Theme is Migrated from hexo-theme-material(https://github.com/viosey/hexo-theme-material)
-Version: 2.0
+Version: 2.0.1
 License: GNU General Public License v2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 Tags: white, light, one-column, material