Tools & Wizards About Us

Report Summary

  • 63

    Performance

    Renders faster than
    77% of other websites

  • 39

    Accessibility

    Visual factors better than
    that of 19% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 62

    SEO

    Google-friendlier than
    23% of websites

21csp.com.cn

中国安防行业网

Page Load Speed

34.8 sec in total

First Response

893 ms

Resources Loaded

33.3 sec

Page Rendered

646 ms

About Website

Click here to check amazing 21 Csp content for China. Otherwise, check out these important facts you probably never knew about 21csp.com.cn

公安部科信局指导，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 21csp.com.cn

Key Findings

We analyzed 21csp.com.cn page load time and found that the first response time was 893 ms and then it took 33.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster. Unfortunately, there was 1 request timeout, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

21csp.com.cn performance score

63

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.8 s

90/100

10%

LCP (Largest Contentful Paint)

Value9.3 s

1/100

25%

SI (Speed Index)

Value4.3 s

75/100

10%

TBT (Total Blocking Time)

Value140 ms

95/100

30%

CLS (Cumulative Layout Shift)

Value0.009

100/100

15%

TTI (Time to Interactive)

Value9.7 s

29/100

10%

Network Requests Diagram

21csp.com.cn

893 ms

www.21csp.com.cn

4185 ms

pub20157.css

656 ms

ind20157.css

6646 ms

function.js

10 ms

Our browser made a total of 201 requests to load all elements on the main page. We found that 45% of them (90 requests) were addressed to the original 21csp.com.cn, 20% (40 requests) were made to News.21csp.com.cn and 16% (32 requests) were made to Ad.21csp.com.cn. The less responsive or slowest element that took the longest time to load (20.2 sec) belongs to the original domain 21csp.com.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 858.2 kB (28%)

Content Size

3.1 MB

After Optimization

2.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 21csp.com.cn main page is 3.1 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. 55% of websites need less resources to load. Images take 2.4 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 108.6 kB

  • Original 134.7 kB
  • After minification 127.0 kB
  • After compression 26.1 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 108.6 kB or 81% of the original size.

Image Optimization

-14%

Potential reduce by 333.1 kB

  • Original 2.4 MB
  • After minification 2.1 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. Obviously, 21 Csp needs image optimization as it can save up to 333.1 kB or 14% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-76%

Potential reduce by 393.1 kB

  • Original 515.1 kB
  • After minification 489.8 kB
  • After compression 122.0 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 393.1 kB or 76% of the original size.

CSS Optimization

-81%

Potential reduce by 23.5 kB

  • Original 29.1 kB
  • After minification 24.8 kB
  • After compression 5.6 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. 21csp.com.cn needs all CSS files to be minified and compressed as it can save up to 23.5 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 23 (12%)

Requests Now

197

After Optimization

174

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 197 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 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 16 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

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

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

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 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 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

Open Graph description is not detected on the main page of 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: