Tools & Wizards About Us
ebook.21csp.com.cn screenshot

Report Summary

  • 73

    Performance

    Renders faster than
    83% of other websites

  • 39

    Accessibility

    Visual factors better than
    that of 18% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 62

    SEO

    Google-friendlier than
    22% of websites

ebook.21csp.com.cn

中国安防行业网

Page Load Speed

9.8 sec in total

First Response

1.6 sec

Resources Loaded

8 sec

Page Rendered

204 ms

ebook.21csp.com.cn screenshot

About Website

Welcome to ebook.21csp.com.cn homepage info - get ready to check Ebook 21 Csp best content for China right away, or after learning these important things about ebook.21csp.com.cn

公安部科信局支持，中国安防协会主办。提供权威准确的法规政策、标准信息、行业资讯，拥有全面详实的安防产品库、安防商家库、安防解决方案库等。为安防管理机构、安防企业、安防用户及相关机构提供全方位的线上线下咨询服务。

Visit ebook.21csp.com.cn

Key Findings

We analyzed Ebook.21csp.com.cn page load time and found that the first response time was 1.6 sec and then it took 8.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

ebook.21csp.com.cn performance score

73

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.7 s

92/100

10%

LCP (Largest Contentful Paint)

Value4.8 s

30/100

25%

SI (Speed Index)

Value4.6 s

70/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.014

100/100

15%

TTI (Time to Interactive)

Value7.7 s

45/100

10%

Network Requests Diagram

ebook.21csp.com.cn

1584 ms

pub.css

2336 ms

dzyb.css

774 ms

xm.js

513 ms

jquery-1.5.1.min.js

3318 ms

Our browser made a total of 57 requests to load all elements on the main page. We found that 68% of them (39 requests) were addressed to the original Ebook.21csp.com.cn, 16% (9 requests) were made to 21csp.com.cn and 4% (2 requests) were made to B2b.21csp.com.cn. The less responsive or slowest element that took the longest time to load (3.8 sec) relates to the external source 21csp.com.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 390.9 kB (23%)

Content Size

1.7 MB

After Optimization

1.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Ebook.21csp.com.cn main page is 1.7 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 25% of websites need less resources to load. Images take 1.4 MB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 20.9 kB

  • Original 27.6 kB
  • After minification 23.9 kB
  • After compression 6.6 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. This page needs HTML code to be minified as it can gain 3.6 kB, which is 13% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 20.9 kB or 76% of the original size.

Image Optimization

-10%

Potential reduce by 133.4 kB

  • Original 1.4 MB
  • After minification 1.2 MB

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. Ebook 21 Csp images are well optimized though.

JavaScript Optimization

-81%

Potential reduce by 227.5 kB

  • Original 279.6 kB
  • After minification 166.5 kB
  • After compression 52.1 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 227.5 kB or 81% of the original size.

CSS Optimization

-78%

Potential reduce by 9.1 kB

  • Original 11.7 kB
  • After minification 9.5 kB
  • After compression 2.6 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. Ebook.21csp.com.cn needs all CSS files to be minified and compressed as it can save up to 9.1 kB or 78% of the original size.

Requests Breakdown

Number of requests can be reduced by 12 (22%)

Requests Now

54

After Optimization

42

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 54 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ebook 21 Csp. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

ebook.21csp.com.cn

ebook.21csp.com.cn

1584 ms

pub.css

pub.css

2336 ms

dzyb.css

dzyb.css

774 ms

xm.js

xm.js

513 ms

jquery-1.5.1.min.js

jquery-1.5.1.min.js

3318 ms

UserInterface.js

UserInterface.js

2563 ms

stat.php

stat.php

1537 ms

TopMenu.js

TopMenu.js

321 ms

MSClass.js

MSClass.js

2093 ms

logo.jpg

logo.jpg

261 ms

000pv.jpg

000pv.jpg

2837 ms

kh.jpg

kh.jpg

1128 ms

sx2.jpg

sx2.jpg

1582 ms

sx.jpg

sx.jpg

1584 ms

sx5.jpg

sx5.jpg

1573 ms

sx11.jpg

sx11.jpg

1576 ms

sx6.jpg

sx6.jpg

1590 ms

ss.jpg

ss.jpg

1721 ms

nav.jpg

nav.jpg

1849 ms

dzyb_title.jpg

dzyb_title.jpg

1907 ms

q2.jpg

q2.jpg

1863 ms

000s.jpg

000s.jpg

2090 ms

000s.jpg

000s.jpg

2118 ms

000s.jpg

000s.jpg

1974 ms

000s.jpg

000s.jpg

2110 ms

000s.jpg

000s.jpg

2390 ms

000s.jpg

000s.jpg

2404 ms

bg78X39_2.gif

bg78X39_2.gif

2255 ms

dzyb_fl.jpg

dzyb_fl.jpg

2372 ms

dzyb_fl_item.jpg

dzyb_fl_item.jpg

2384 ms

dzyb_title_bg.jpg

dzyb_title_bg.jpg

2392 ms

000s.jpg

000s.jpg

2510 ms

000s.jpg

000s.jpg

2644 ms

000s.jpg

000s.jpg

2654 ms

000s.jpg

000s.jpg

2646 ms

000s.jpg

000s.jpg

2657 ms

000s.jpg

000s.jpg

2669 ms

000s.jpg

000s.jpg

2821 ms

000s.jpg

000s.jpg

2901 ms

001pv.jpg

001pv.jpg

2830 ms

000pv.jpg

000pv.jpg

2844 ms

001pv.jpg

001pv.jpg

1687 ms

000pv.jpg

000pv.jpg

2826 ms

001pv.jpg

001pv.jpg

2864 ms

000s.jpg

000s.jpg

2199 ms

000s.jpg

000s.jpg

3167 ms

000s.jpg

000s.jpg

3795 ms

stat.htm

stat.htm

160 ms

core.php

core.php

804 ms

9.gif

9.gif

622 ms

pic.gif

pic.gif

586 ms

h_mainnav_bg.gif

h_mainnav_bg.gif

2106 ms

Userlogin.html

Userlogin.html

2102 ms

DateFormat.js

DateFormat.js

2097 ms

interface.aspx

interface.aspx

755 ms

bg78X39_1.gif

bg78X39_1.gif

2066 ms

app.gif

app.gif

1205 ms

Accessibility Review

ebook.21csp.com.cn accessibility score

39

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

ebook.21csp.com.cn best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

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

Low

Detected JavaScript libraries

SEO Factors

ebook.21csp.com.cn SEO score

62

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

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

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 Ebook.21csp.com.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 Ebook.21csp.com.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

ebook.21csp.com.cn

Open Graph description is not detected on the main page of Ebook 21 Csp. 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: