34.8 sec in total
893 ms
33.3 sec
646 ms
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.cnWe 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 an excellent result, as only a small number 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.
21csp.com.cn performance score
name
value
score
weighting
Value1.8 s
90/100
10%
Value9.3 s
1/100
25%
Value4.3 s
75/100
10%
Value140 ms
95/100
30%
Value0.009
100/100
15%
Value9.7 s
29/100
10%
893 ms
4185 ms
656 ms
6646 ms
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 size can be reduced by 858.2 kB (28%)
3.1 MB
2.3 MB
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.
Potential reduce by 108.6 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. 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.
Potential reduce by 333.1 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, 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.
Potential reduce by 393.1 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 393.1 kB or 76% of the original size.
Potential reduce by 23.5 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.
Number of requests can be reduced by 23 (12%)
197
174
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.
{{url}}
{{time}} ms
21csp.com.cn accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
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
<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
Image elements do not have [alt] attributes
Form elements do not have associated labels
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
Lists do not contain only <li> elements and script supporting elements (<script> and <template>).
21csp.com.cn best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
21csp.com.cn SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
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
Image elements do not have [alt] attributes
ZH
N/A
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.
{{og_description}}
21csp.com.cn
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: