Tools & Wizards About Us
021chang.cn screenshot

Report Summary

  • 95

    Performance

    Renders faster than
    93% of other websites

  • 41

    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

021chang.cn

上海厂房网-上海厂房出租出售,仓库出租,土地出售转让等招商信息免费平台

Page Load Speed

51.9 sec in total

First Response

9.2 sec

Resources Loaded

42.1 sec

Page Rendered

533 ms

021chang.cn screenshot

About Website

Welcome to 021chang.cn homepage info - get ready to check 021 Chang best content right away, or after learning these important things about 021chang.cn

上海厂房网是提供上海厂房出租,上海厂房出售信息,上海厂房租赁,上海厂房招商信息,上海厂房招租,上海仓库出租,上海土地出售转让,工业园区厂房租售信息网一流资源网站!

Visit 021chang.cn

Key Findings

We analyzed 021chang.cn page load time and found that the first response time was 9.2 sec and then it took 42.6 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 were 11 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

021chang.cn performance score

95

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.3 s

98/100

10%

LCP (Largest Contentful Paint)

Value2.0 s

97/100

25%

SI (Speed Index)

Value5.3 s

59/100

10%

TBT (Total Blocking Time)

Value40 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.015

100/100

15%

TTI (Time to Interactive)

Value1.6 s

100/100

10%

Network Requests Diagram

021chang.cn

9247 ms

global.css

5097 ms

sindex.css

961 ms

fwrx.gif

3984 ms

set_index.gif

6306 ms

Our browser made a total of 78 requests to load all elements on the main page. We found that all of those requests were addressed to 021chang.cn and no external sources were called. The less responsive or slowest element that took the longest time to load (20 sec) belongs to the original domain 021chang.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 76.3 kB (28%)

Content Size

275.3 kB

After Optimization

199.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 021chang.cn main page is 275.3 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 15% of websites need less resources to load. Images take 205.2 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 42.6 kB

  • Original 53.2 kB
  • After minification 52.5 kB
  • After compression 10.6 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 42.6 kB or 80% of the original size.

Image Optimization

-10%

Potential reduce by 20.3 kB

  • Original 205.2 kB
  • After minification 184.9 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. 021 Chang images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 0 B

  • Original 18 B
  • After minification 18 B
  • After compression 18 B

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. This website has mostly compressed JavaScripts.

CSS Optimization

-79%

Potential reduce by 13.4 kB

  • Original 16.8 kB
  • After minification 13.9 kB
  • After compression 3.5 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. 021chang.cn needs all CSS files to be minified and compressed as it can save up to 13.4 kB or 79% of the original size.

Requests Breakdown

Number of requests can be reduced by 23 (35%)

Requests Now

66

After Optimization

43

  • Images
  • JavaScript
  • CSS

The browser has sent 66 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 021 Chang. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Network Requests Diagram

021chang.cn

021chang.cn

9247 ms

global.css

global.css

5097 ms

sindex.css

sindex.css

961 ms

fwrx.gif

fwrx.gif

3984 ms

set_index.gif

set_index.gif

6306 ms

set_sc.gif

set_sc.gif

1441 ms

thea24.js

thea24.js

8512 ms

thea25.js

thea25.js

6264 ms

logo.jpg

logo.jpg

1473 ms

body_bg.jpg

body_bg.jpg

3264 ms

top_bg.gif

top_bg.gif

513 ms

index_a.gif

index_a.gif

498 ms

ggao.gif

ggao.gif

6996 ms

fabu.gif

fabu.gif

11422 ms

icon_01.jpg

icon_01.jpg

1001 ms

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2419 ms

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5746 ms

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3387 ms

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7082 ms

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9685 ms

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4890 ms

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11251 ms

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9569 ms

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20037 ms

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10786 ms

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11405 ms

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13675 ms

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11281 ms

more.jpg

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11725 ms

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bk_top_950.gif

11787 ms

bk_bottom_950.gif

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11885 ms

top640.gif

top640.gif

11940 ms

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12224 ms

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12219 ms

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12351 ms

bottom640.gif

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12395 ms

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12678 ms

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15228 ms

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14866 ms

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20033 ms

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20033 ms

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17482 ms

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16257 ms

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9510 ms

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9105 ms

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8175 ms

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13669 ms

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20032 ms

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5852 ms

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20033 ms

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16164 ms

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19547 ms

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19535 ms

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20039 ms

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19835 ms

ck.jpg

ck.jpg

19619 ms

td.jpg

td.jpg

17767 ms

zs.jpg

zs.jpg

17625 ms

top310.gif

top310.gif

16531 ms

bottom310.gif

bottom310.gif

15780 ms

rss.gif

rss.gif

14815 ms

phone.png

phone.png

19955 ms

phone.jpg

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14199 ms

ico_qq.gif

ico_qq.gif

12511 ms

qq.jpg

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15676 ms

email.png

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11648 ms

email.jpg

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12454 ms

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18663 ms

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12714 ms

current_tab.gif

current_tab.gif

15125 ms

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Menu.gif

12753 ms

line.jpg

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13034 ms

sousuo.jpg

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13368 ms

bk_middle_950.gif

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13478 ms

middle640.gif

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13864 ms

hot_cfbg.jpg

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14127 ms

vipbox.gif

vipbox.gif

14455 ms

middle310.gif

middle310.gif

14201 ms

Accessibility Review

021chang.cn accessibility score

41

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.

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

High

<object> elements do not have alternate text

Best Practices

021chang.cn best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

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

High

Browser errors were logged to the console

SEO Factors

021chang.cn SEO score

62

Search Engine Optimization Advices

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

High

Document uses plugins

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 021chang.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 021chang.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

021chang.cn

Open Graph description is not detected on the main page of 021 Chang. 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: