Tools & Wizards About Us
51zhileng.com screenshot

Report Summary

  • 27

    Performance

    Renders faster than
    46% of other websites

  • 41

    Accessibility

    Visual factors better than
    that of 19% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

51zhileng.com

冷银制冰(icebank),直冷式块冰机,直冷式制冰机,大型块冰机,冰瓶机,盐水制冰机,大型制冰设备,制冰工厂,制冰厂设备,制冰机知识,山东冷银制冷科技有限公司-宝成制冰

Page Load Speed

35.4 sec in total

First Response

1.2 sec

Resources Loaded

34 sec

Page Rendered

229 ms

51zhileng.com screenshot

About Website

Visit 51zhileng.com now to see the best up-to-date 51 Zhileng content and also check out these interesting facts you probably never knew about 51zhileng.com

山东冷银制冷科技有限公司专业研发和生产各种制冰设备、速冻隧道，已有20多年的经验，是国内较早从事制冰设备生产的企业，是一家集各种制冰设备、速冻设备，成套制冰、速冻系统，各种降温冷却系统为一体的制冷设备公司。

Visit 51zhileng.com

Key Findings

We analyzed 51zhileng.com page load time and found that the first response time was 1.2 sec and then it took 34.2 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 2 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

51zhileng.com performance score

27

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.3 s

39/100

10%

LCP (Largest Contentful Paint)

Value9.0 s

1/100

25%

SI (Speed Index)

Value18.9 s

0/100

10%

TBT (Total Blocking Time)

Value450 ms

63/100

30%

CLS (Cumulative Layout Shift)

Value0.519

15/100

15%

TTI (Time to Interactive)

Value12.2 s

15/100

10%

Network Requests Diagram

51zhileng.com

1192 ms

mobile.js

518 ms

metinfo_ui.css

1442 ms

metinfo.css

983 ms

jQuery1.7.2.js

1215 ms

Our browser made a total of 54 requests to load all elements on the main page. We found that 85% of them (46 requests) were addressed to the original 51zhileng.com, 6% (3 requests) were made to Hm.baidu.com and 4% (2 requests) were made to Wpa.qq.com. The less responsive or slowest element that took the longest time to load (20.2 sec) relates to the external source Hm.baidu.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 208.4 kB (11%)

Content Size

1.9 MB

After Optimization

1.7 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 51zhileng.com main page is 1.9 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. 40% of websites need less resources to load. Images take 1.7 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 32.6 kB

  • Original 40.7 kB
  • After minification 37.2 kB
  • After compression 8.1 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 32.6 kB or 80% of the original size.

Image Optimization

-3%

Potential reduce by 58.3 kB

  • Original 1.7 MB
  • After minification 1.6 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. 51 Zhileng images are well optimized though.

JavaScript Optimization

-58%

Potential reduce by 91.2 kB

  • Original 155.9 kB
  • After minification 151.6 kB
  • After compression 64.7 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 91.2 kB or 58% of the original size.

CSS Optimization

-75%

Potential reduce by 26.3 kB

  • Original 35.3 kB
  • After minification 31.6 kB
  • After compression 9.0 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. 51zhileng.com needs all CSS files to be minified and compressed as it can save up to 26.3 kB or 75% of the original size.

Requests Breakdown

Number of requests can be reduced by 10 (21%)

Requests Now

48

After Optimization

38

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 48 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 51 Zhileng. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

51zhileng.com

51zhileng.com

1192 ms

mobile.js

mobile.js

518 ms

metinfo_ui.css

metinfo_ui.css

1442 ms

metinfo.css

metinfo.css

983 ms

jQuery1.7.2.js

jQuery1.7.2.js

1215 ms

ch.js

ch.js

862 ms

metinfo_ui.js

metinfo_ui.js

1665 ms

shield.js

shield.js

863 ms

video.js

video.js

1402 ms

banner.js

banner.js

1511 ms

marquee.js

marquee.js

1524 ms

fun.inc.js

fun.inc.js

1638 ms

metinfo.js

metinfo.js

1943 ms

stat.php

stat.php

2058 ms

online.js

online.js

1883 ms

hm.js

hm.js

19877 ms

1495782041446171.jpg

1495782041446171.jpg

1965 ms

1519101652.jpg

1519101652.jpg

502 ms

ico_map_common.png

ico_map_common.png

706 ms

ico_head_btnsearch.png

ico_head_btnsearch.png

425 ms

1515767682.jpg

1515767682.jpg

2441 ms

1515768297.jpg

1515768297.jpg

1652 ms

1515768370.jpg

1515768370.jpg

1967 ms

1515768382.jpg

1515768382.jpg

2906 ms

thumb.php

thumb.php

1082 ms

thumb.php

thumb.php

1374 ms

thumb.php

thumb.php

1717 ms

thumb.php

thumb.php

1828 ms

ititle.png

ititle.png

2194 ms

img_placeholder.png

img_placeholder.png

3403 ms

more.png

more.png

2459 ms

1436189146.jpg

1436189146.jpg

3234 ms

1502357571.jpg

1502357571.jpg

4696 ms

1502357161.jpeg

1502357161.jpeg

4703 ms

1502357520.jpg

1502357520.jpg

4702 ms

banner-1.jpg

banner-1.jpg

3966 ms

icon3.jpg

icon3.jpg

3831 ms

pnt.png

pnt.png

3882 ms

1494907037.jpg

1494907037.jpg

6738 ms

h.js

h.js

602 ms

h.js

h.js

20219 ms

online.css

online.css

1352 ms

online.php

online.php

5413 ms

thumb.php

thumb.php

3123 ms

thumb.php

thumb.php

9221 ms

thumb.php

thumb.php

8981 ms

thumb.php

thumb.php

9934 ms

thumb.php

thumb.php

6812 ms

pa

pa

663 ms

msn_1.gif

msn_1.gif

4816 ms

pa

pa

661 ms

T1B7m.XeXuXXaHNz_X-16-16.gif

T1B7m.XeXuXXaHNz_X-16-16.gif

449 ms

button_old_31.gif

button_old_31.gif

981 ms

button_old_31.gif

button_old_31.gif

998 ms

Accessibility Review

51zhileng.com accessibility score

41

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-hidden="true"] elements contain focusable descendents

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

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

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

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

51zhileng.com best practices score

67

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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

51zhileng.com SEO score

83

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

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

High

Tap targets are not sized appropriately

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 51zhileng.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 51zhileng.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

51zhileng.com

Open Graph description is not detected on the main page of 51 Zhileng. 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: