Tools & Wizards About Us
ledman.cn screenshot

Report Summary

  • 18

    Performance

    Renders faster than
    34% of other websites

  • 83

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

ledman.cn

雷曼 全球领先的LED超高清显示专家-深圳雷曼光电科技股份有限公司

Page Load Speed

39.7 sec in total

First Response

6.7 sec

Resources Loaded

32.8 sec

Page Rendered

160 ms

ledman.cn screenshot

About Website

Visit ledman.cn now to see the best up-to-date Ledman content and also check out these interesting facts you probably never knew about ledman.cn

深圳雷曼光电科技股份有限公司(证券简称：雷曼光电，证券代码：300162)成立于2004年，是全球领先的LED超高清显示专家，全球COB新型显示技术领军企业，8K超高清LED巨幕显示领导者，中国第一家LED显示屏高科技上市公司，中国航天事业战略合作伙伴，2022北京冬奥会开幕式冰雪五环出品商。

Visit ledman.cn

Key Findings

We analyzed Ledman.cn page load time and found that the first response time was 6.7 sec and then it took 33 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 34 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

ledman.cn performance score

18

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

15/100

10%

LCP (Largest Contentful Paint)

Value6.3 s

10/100

25%

SI (Speed Index)

Value39.4 s

0/100

10%

TBT (Total Blocking Time)

Value680 ms

44/100

30%

CLS (Cumulative Layout Shift)

Value0.773

5/100

15%

TTI (Time to Interactive)

Value19.3 s

2/100

10%

Network Requests Diagram

ledman.cn

6719 ms

common.css

1559 ms

index.css

3261 ms

20160301141455_41857.jpg

19904 ms

20150615083448_50179.jpg

19903 ms

Our browser made a total of 63 requests to load all elements on the main page. We found that 90% of them (57 requests) were addressed to the original Ledman.cn, 2% (1 request) were made to S95.cnzz.com and 2% (1 request) were made to Oz.cnzz.com. The less responsive or slowest element that took the longest time to load (20.4 sec) belongs to the original domain Ledman.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 68.3 kB (56%)

Content Size

121.7 kB

After Optimization

53.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Ledman.cn main page is 121.7 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. Only 5% of websites need less resources to load. Images take 66.6 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 23.7 kB

  • Original 29.3 kB
  • After minification 23.9 kB
  • After compression 5.6 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. This page needs HTML code to be minified as it can gain 5.4 kB, which is 18% 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 23.7 kB or 81% of the original size.

Image Optimization

-36%

Potential reduce by 24.0 kB

  • Original 66.6 kB
  • After minification 42.6 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, Ledman needs image optimization as it can save up to 24.0 kB or 36% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-83%

Potential reduce by 12.3 kB

  • Original 14.9 kB
  • After minification 9.9 kB
  • After compression 2.6 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 12.3 kB or 83% of the original size.

CSS Optimization

-76%

Potential reduce by 8.3 kB

  • Original 11.0 kB
  • After minification 8.6 kB
  • After compression 2.7 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. Ledman.cn needs all CSS files to be minified and compressed as it can save up to 8.3 kB or 76% of the original size.

Requests Breakdown

Number of requests can be reduced by 7 (26%)

Requests Now

27

After Optimization

20

  • Images
  • JavaScript
  • CSS

The browser has sent 27 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ledman. 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

ledman.cn

ledman.cn

6719 ms

common.css

common.css

1559 ms

index.css

index.css

3261 ms

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20160301141455_41857.jpg

19904 ms

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20150615083448_50179.jpg

19903 ms

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19904 ms

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19903 ms

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19904 ms

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12831 ms

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19259 ms

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20433 ms

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20433 ms

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20433 ms

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20434 ms

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20433 ms

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20434 ms

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19959 ms

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19960 ms

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20150128032813_70943.png

19960 ms

jwplayer2.js

jwplayer2.js

19993 ms

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19998 ms

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19995 ms

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19995 ms

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19995 ms

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19994 ms

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19995 ms

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19995 ms

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19995 ms

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19995 ms

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19995 ms

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19995 ms

jquery-1.8.3.min.js

jquery-1.8.3.min.js

19539 ms

script.js

script.js

19538 ms

jquery.easing.min.js

jquery.easing.min.js

20056 ms

move.js

move.js

20056 ms

jquery.SuperSlide.js

jquery.SuperSlide.js

20056 ms

div_move.js

div_move.js

20055 ms

nav_icon.png

nav_icon.png

19643 ms

sub_navbd.png

sub_navbd.png

19608 ms

ser_icon.png

ser_icon.png

10986 ms

h_icon1.png

h_icon1.png

4129 ms

h_icon2.png

h_icon2.png

4028 ms

h_icon3.png

h_icon3.png

4036 ms

media_icon.png

media_icon.png

4834 ms

title_icon.png

title_icon.png

4462 ms

news_yy.png

news_yy.png

4538 ms

product_yy.png

product_yy.png

3539 ms

recurt_yy.png

recurt_yy.png

5035 ms

case_yy.png

case_yy.png

4962 ms

news_shyy.png

news_shyy.png

4977 ms

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4228 ms

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4607 ms

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8037 ms

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4988 ms

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5424 ms

wx_img.jpg

wx_img.jpg

5479 ms

foot_img.jpg

foot_img.jpg

5795 ms

z_stat.php

z_stat.php

1084 ms

stat.htm

stat.htm

717 ms

core.php

core.php

727 ms

9.gif

9.gif

1282 ms

pic1.gif

pic1.gif

854 ms

app.gif

app.gif

922 ms

Accessibility Review

ledman.cn accessibility score

83

Accessibility Issues

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

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

ledman.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

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

ledman.cn SEO score

92

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

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

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 Ledman.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 Ledman.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.

Social Sharing Optimization

ledman.cn

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