Tools & Wizards About Us
21cp.com screenshot

Report Summary

  • 25

    Performance

    Renders faster than
    44% of other websites

  • 54

    Accessibility

    Visual factors better than
    that of 23% of websites

  • 0

    Best Practices

  • 62

    SEO

    Google-friendlier than
    23% of websites

21cp.com

中塑在线-塑料网-21世纪塑料行业门户

Page Load Speed

79.4 sec in total

First Response

1.1 sec

Resources Loaded

77 sec

Page Rendered

1.3 sec

21cp.com screenshot

About Website

Click here to check amazing 21 Cp content for United States. Otherwise, check out these important facts you probably never knew about 21cp.com

中塑在线是21世纪塑料行业门户网站，每日发布涉及塑料行业资讯，参与塑料行业交流，更新塑料行业商品报价，涉及原料、改性、再生料、废旧料、助剂、塑料机械、塑料制品全产业链！中塑在线专为国内外塑化行业人士，提供资讯服务及信息交流，让您随时了解市场变化，把握商机!

Visit 21cp.com

Key Findings

We analyzed 21cp.com page load time and found that the first response time was 1.1 sec and then it took 78.3 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 were 81 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

21cp.com performance score

25

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.3 s

1/100

10%

LCP (Largest Contentful Paint)

Value7.9 s

3/100

25%

SI (Speed Index)

Value9.5 s

11/100

10%

TBT (Total Blocking Time)

Value1,100 ms

23/100

30%

CLS (Cumulative Layout Shift)

Value0.051

99/100

15%

TTI (Time to Interactive)

Value14.1 s

9/100

10%

Network Requests Diagram

21cp.com

1113 ms

www.21cp.com

11989 ms

common.css

9809 ms

home_page_v2015.css

4043 ms

jquery.min.js

13720 ms

Our browser made a total of 186 requests to load all elements on the main page. We found that 3% of them (5 requests) were addressed to the original 21cp.com, 31% (58 requests) were made to Img.21cp.cc and 16% (30 requests) were made to Static.21cp.cc. The less responsive or slowest element that took the longest time to load (20.4 sec) relates to the external source Img.21cp.cc.

Page Optimization Overview & Recommendations

Page size can be reduced by 639.4 kB (31%)

Content Size

2.1 MB

After Optimization

1.4 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 21cp.com main page is 2.1 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. 25% of websites need less resources to load. Images take 1.6 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 139.6 kB

  • Original 173.9 kB
  • After minification 149.7 kB
  • After compression 34.4 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 24.2 kB, which is 14% 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 139.6 kB or 80% of the original size.

Image Optimization

-16%

Potential reduce by 257.2 kB

  • Original 1.6 MB
  • After minification 1.3 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 Cp needs image optimization as it can save up to 257.2 kB or 16% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-74%

Potential reduce by 147.6 kB

  • Original 198.6 kB
  • After minification 149.8 kB
  • After compression 51.0 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 147.6 kB or 74% of the original size.

CSS Optimization

-81%

Potential reduce by 95.1 kB

  • Original 117.0 kB
  • After minification 103.6 kB
  • After compression 21.9 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. 21cp.com needs all CSS files to be minified and compressed as it can save up to 95.1 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 24 (24%)

Requests Now

101

After Optimization

77

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 101 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 21 Cp. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

21cp.com

21cp.com

1113 ms

www.21cp.com

www.21cp.com

11989 ms

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Accessibility Review

21cp.com accessibility score

54

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.

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

SEO Factors

21cp.com 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

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 21cp.com 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 21cp.com 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.

Social Sharing Optimization

21cp.com

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