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1.3 sec
11 sec
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Welcome to b2b.21csp.com.cn homepage info - get ready to check B 2 21 Csp best content for China right away, or after learning these important things about b2b.21csp.com.cn
产品中心频道依托于中国安防行业协会,为企业提供专业的安防行业电子商务平台,供应视频监控、防盗报警、门禁识别、楼宇对讲、智能交通等各类安防产品。我们不仅提供最新的安防技术、产品动态,更提供最专业优质的服务。
Visit b2b.21csp.com.cnWe analyzed B2b.21csp.com.cn page load time and found that the first response time was 1.3 sec and then it took 11.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.
b2b.21csp.com.cn performance score
name
value
score
weighting
Value2.3 s
75/100
10%
Value4.4 s
39/100
25%
Value7.4 s
28/100
10%
Value3,620 ms
1/100
30%
Value0.079
94/100
15%
Value11.2 s
20/100
10%
1321 ms
504 ms
510 ms
1275 ms
513 ms
Our browser made a total of 100 requests to load all elements on the main page. We found that 82% of them (82 requests) were addressed to the original B2b.21csp.com.cn, 10% (10 requests) were made to 21csp.com.cn and 1% (1 request) were made to S15.cnzz.com. The less responsive or slowest element that took the longest time to load (6.2 sec) belongs to the original domain B2b.21csp.com.cn.
Page size can be reduced by 326.9 kB (22%)
1.5 MB
1.1 MB
In fact, the total size of B2b.21csp.com.cn main page is 1.5 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. 35% of websites need less resources to load. Images take 1.2 MB which makes up the majority of the site volume.
Potential reduce by 88.5 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 11.8 kB, which is 11% 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 88.5 kB or 84% of the original size.
Potential reduce by 147.3 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, B 2 21 Csp needs image optimization as it can save up to 147.3 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 79.8 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 79.8 kB or 65% of the original size.
Potential reduce by 11.4 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. B2b.21csp.com.cn needs all CSS files to be minified and compressed as it can save up to 11.4 kB or 76% of the original size.
Number of requests can be reduced by 4 (4%)
98
94
The browser has sent 98 CSS, Javascripts, AJAX and image requests in order to completely render the main page of B 2 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 5 to 1 for JavaScripts and as a result speed up the page load time.
b2b.21csp.com.cn
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b2b.21csp.com.cn accessibility score
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>).
b2b.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
b2b.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
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise B2b.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 B2b.21csp.com.cn main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.
b2b.21csp.com.cn
Open Graph description is not detected on the main page of B 2 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: