Tools & Wizards About Us
51xue.org.cn screenshot

Report Summary

  • 72

    Performance

    Renders faster than
    82% of other websites

  • 51

    Accessibility

    Visual factors better than
    that of 21% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 58

    SEO

    Google-friendlier than
    20% of websites

51xue.org.cn

中华职工学习网

Page Load Speed

73.2 sec in total

First Response

19.3 sec

Resources Loaded

53.6 sec

Page Rendered

233 ms

51xue.org.cn screenshot

About Website

Click here to check amazing 51 Xue content. Otherwise, check out these important facts you probably never knew about 51xue.org.cn

中华职工学习网 - 致力打造中国最大最权威的职工学习资源平台!

Visit 51xue.org.cn

Key Findings

We analyzed 51xue.org.cn page load time and found that the first response time was 19.3 sec and then it took 53.9 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster. This domain responded with an error, which can significantly jeopardize 51xue.org.cn rating and web reputation

Performance Metrics

51xue.org.cn performance score

72

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

68/100

10%

LCP (Largest Contentful Paint)

Value6.3 s

11/100

25%

SI (Speed Index)

Value4.5 s

73/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value2.5 s

98/100

10%

Network Requests Diagram

51xue.org.cn

19349 ms

stylemain.css

850 ms

bookmark.css

856 ms

Topad.js

852 ms

flash.js

856 ms

Our browser made a total of 68 requests to load all elements on the main page. We found that all of those requests were addressed to 51xue.org.cn and no external sources were called. The less responsive or slowest element that took the longest time to load (20.5 sec) belongs to the original domain 51xue.org.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 133.1 kB (41%)

Content Size

322.4 kB

After Optimization

189.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 51xue.org.cn main page is 322.4 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 15% of websites need less resources to load. Images take 230.4 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 59.1 kB

  • Original 78.4 kB
  • After minification 73.3 kB
  • After compression 19.3 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 59.1 kB or 75% of the original size.

Image Optimization

-28%

Potential reduce by 64.6 kB

  • Original 230.4 kB
  • After minification 165.8 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Obviously, 51 Xue needs image optimization as it can save up to 64.6 kB or 28% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-65%

Potential reduce by 2.0 kB

  • Original 3.0 kB
  • After minification 2.3 kB
  • After compression 1.0 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 2.0 kB or 65% of the original size.

CSS Optimization

-70%

Potential reduce by 7.5 kB

  • Original 10.6 kB
  • After minification 9.3 kB
  • After compression 3.1 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. 51xue.org.cn needs all CSS files to be minified and compressed as it can save up to 7.5 kB or 70% of the original size.

Requests Breakdown

Number of requests can be reduced by 18 (28%)

Requests Now

65

After Optimization

47

  • Images
  • JavaScript
  • CSS

The browser has sent 65 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 51 Xue. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

51xue.org.cn

51xue.org.cn

19349 ms

stylemain.css

stylemain.css

850 ms

bookmark.css

bookmark.css

856 ms

Topad.js

Topad.js

852 ms

flash.js

flash.js

856 ms

topnav.css

topnav.css

3689 ms

global.css

global.css

818 ms

layout.css

layout.css

977 ms

study.css

study.css

9921 ms

WebResource.axd

WebResource.axd

6576 ms

index_Flash1.js

index_Flash1.js

541 ms

top_ling.gif

top_ling.gif

855 ms

top_zhuanjia.gif

top_zhuanjia.gif

850 ms

logo.jpg

logo.jpg

5658 ms

top_lishi.gif

top_lishi.gif

1043 ms

top_jizhe.gif

top_jizhe.gif

1041 ms

top_navbak.gif

top_navbak.gif

1682 ms

top_sub.gif

top_sub.gif

1726 ms

polity.jpg

polity.jpg

2686 ms

bul.gif

bul.gif

2094 ms

ten1.gif

ten1.gif

2727 ms

ten2.gif

ten2.gif

2740 ms

ten3.gif

ten3.gif

2905 ms

wangzhaoguo.jpg

wangzhaoguo.jpg

9915 ms

zizhe.jpg

zizhe.jpg

7818 ms

bai.jpg

bai.jpg

20215 ms

xin_06210042300467811309942.jpg

xin_06210042300467811309942.jpg

20491 ms

bbs1.jpg

bbs1.jpg

9503 ms

tesetuan.jpg

tesetuan.jpg

20490 ms

chuangzheng.jpg

chuangzheng.jpg

11003 ms

study.jpg

study.jpg

20491 ms

a.jpg

a.jpg

16399 ms

youdian.jpg

youdian.jpg

16655 ms

gg.gif

gg.gif

20492 ms

1.gif

1.gif

17503 ms

2.gif

2.gif

18557 ms

3.gif

3.gif

19389 ms

4.gif

4.gif

20222 ms

10.gif

10.gif

20010 ms

123_03.jpg

123_03.jpg

20020 ms

123_06.jpg

123_06.jpg

19652 ms

by_10540.gif

by_10540.gif

19766 ms

2007070409324339872.jpg

2007070409324339872.jpg

2573 ms

2007061911165227112.jpg

2007061911165227112.jpg

2570 ms

logo1.gif

logo1.gif

19392 ms

qide.jpg

qide.jpg

19765 ms

hengshu.gif

hengshu.gif

19752 ms

hygjyyzx.gif

hygjyyzx.gif

19497 ms

xdl_070205.gif

xdl_070205.gif

19835 ms

xinshijie.gif

xinshijie.gif

17136 ms

1.jpg

1.jpg

19671 ms

lb.jpg

lb.jpg

17972 ms

pic01.jpg

pic01.jpg

18153 ms

pic02.jpg

pic02.jpg

20486 ms

top_ad.jpg

top_ad.jpg

20090 ms

tailor.jpg

tailor.jpg

12002 ms

index_06.jpg

index_06.jpg

13065 ms

index_14.jpg

index_14.jpg

10457 ms

z_03.jpg

z_03.jpg

10512 ms

z_04.jpg

z_04.jpg

10369 ms

42069.94870399.gif

42069.94870399.gif

10949 ms

jac1.jpg

jac1.jpg

19998 ms

53379.51315012.jpg

53379.51315012.jpg

16130 ms

55908.6410676.jpg

55908.6410676.jpg

11343 ms

61224.66382262.jpg

61224.66382262.jpg

15034 ms

39424.91521075.jpg

39424.91521075.jpg

19994 ms

work.jpg

work.jpg

15007 ms

z_39.jpg

z_39.jpg

18958 ms

Accessibility Review

51xue.org.cn accessibility score

51

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

High

<object> elements do not have alternate text

Best Practices

51xue.org.cn best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

51xue.org.cn SEO score

58

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Document uses plugins

Language and Encoding

  • Language Detected

    ZH

  • Language Claimed

    N/A

  • Encoding

    GB2312

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 51xue.org.cn can be misinterpreted by Google and other search engines. Our service has detected that Chinese is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that 51xue.org.cn main page’s claimed encoding is gb2312. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

51xue.org.cn

Open Graph description is not detected on the main page of 51 Xue. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: