Tools & Wizards About Us
english.ntsc.cas.cn screenshot

Report Summary

  • 56

    Performance

    Renders faster than
    72% of other websites

  • 61

    Accessibility

    Visual factors better than
    that of 27% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 90

    SEO

    Google-friendlier than
    68% of websites

english.ntsc.cas.cn

National Time Service Center Chinese Academy Of Scences

Page Load Speed

6.7 sec in total

First Response

976 ms

Resources Loaded

5.3 sec

Page Rendered

430 ms

english.ntsc.cas.cn screenshot

About Website

Welcome to english.ntsc.cas.cn homepage info - get ready to check English Ntsc Cas best content for China right away, or after learning these important things about english.ntsc.cas.cn

National Time Service Center (NTSC) of the Chinese Academy of Sciences (CAS), formerly known as Shaanxi Astronomical Observatory, is the only professional research institute of China which specializes...

Visit english.ntsc.cas.cn

Key Findings

We analyzed English.ntsc.cas.cn page load time and found that the first response time was 976 ms and then it took 5.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

english.ntsc.cas.cn performance score

56

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.4 s

70/100

10%

LCP (Largest Contentful Paint)

Value23.6 s

0/100

25%

SI (Speed Index)

Value8.1 s

21/100

10%

TBT (Total Blocking Time)

Value90 ms

98/100

30%

CLS (Cumulative Layout Shift)

Value0.126

83/100

15%

TTI (Time to Interactive)

Value7.3 s

49/100

10%

Network Requests Diagram

english.ntsc.cas.cn

976 ms

gjsszx-bootstrap.min.css

1861 ms

font-awesome.min.css

1444 ms

gjsszx-common.css

954 ms

swiper4.0.5.min.css

1197 ms

Our browser made a total of 45 requests to load all elements on the main page. We found that 98% of them (44 requests) were addressed to the original English.ntsc.cas.cn, 2% (1 request) were made to Api.cas.cn. The less responsive or slowest element that took the longest time to load (4.5 sec) belongs to the original domain English.ntsc.cas.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 957.9 kB (19%)

Content Size

5.0 MB

After Optimization

4.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of English.ntsc.cas.cn main page is 5.0 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. 45% of websites need less resources to load. Images take 4.3 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 27.0 kB

  • Original 32.9 kB
  • After minification 24.2 kB
  • After compression 5.9 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 8.7 kB, which is 27% 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 27.0 kB or 82% of the original size.

Image Optimization

-10%

Potential reduce by 408.0 kB

  • Original 4.3 MB
  • After minification 3.9 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. English Ntsc Cas images are well optimized though.

JavaScript Optimization

-76%

Potential reduce by 309.1 kB

  • Original 404.9 kB
  • After minification 337.5 kB
  • After compression 95.8 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 309.1 kB or 76% of the original size.

CSS Optimization

-84%

Potential reduce by 213.9 kB

  • Original 255.7 kB
  • After minification 232.2 kB
  • After compression 41.8 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. English.ntsc.cas.cn needs all CSS files to be minified and compressed as it can save up to 213.9 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 13 (30%)

Requests Now

44

After Optimization

31

  • Images
  • JavaScript
  • CSS

The browser has sent 44 CSS, Javascripts, AJAX and image requests in order to completely render the main page of English Ntsc Cas. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

english.ntsc.cas.cn

english.ntsc.cas.cn

976 ms

gjsszx-bootstrap.min.css

gjsszx-bootstrap.min.css

1861 ms

font-awesome.min.css

font-awesome.min.css

1444 ms

gjsszx-common.css

gjsszx-common.css

954 ms

swiper4.0.5.min.css

swiper4.0.5.min.css

1197 ms

gjsszx-style.css

gjsszx-style.css

1229 ms

gjsszx-style-media.css

gjsszx-style-media.css

739 ms

index-logo.png

index-logo.png

984 ms

gjsszx-yy.png

gjsszx-yy.png

1968 ms

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W020210812714104439025.png

4543 ms

gjsszx-jquery.min.js

gjsszx-jquery.min.js

1978 ms

gjsszx-bootstrap.min.js

gjsszx-bootstrap.min.js

1439 ms

gjsszx-web-common.js

gjsszx-web-common.js

1976 ms

swiper4.0.5.min.js

swiper4.0.5.min.js

1920 ms

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W020240816543375427609.png

2091 ms

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W020240717371805238599.png

2471 ms

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2400 ms

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gjsszx-you.png

2223 ms

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2225 ms

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2323 ms

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W020210812527380650895.png

2469 ms

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W020211122335815006809.png

3008 ms

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gjsszx-05.png

2557 ms

gjsszx-time.png

gjsszx-time.png

2640 ms

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P020210812407230012493.png

2718 ms

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gjsszx-part3-zuo.png

2716 ms

gjsszx-part3-you.png

gjsszx-part3-you.png

2791 ms

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P020211122332355586107.png

2881 ms

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2964 ms

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2966 ms

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3025 ms

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3121 ms

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3212 ms

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3212 ms

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3253 ms

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3258 ms

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3361 ms

gjsszx-logo2.png

gjsszx-logo2.png

3458 ms

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gjsszx-sousuo.png

1831 ms

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gjsszx-03.jpg

1875 ms

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gjsszx-part2.png

1864 ms

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gjsszx-part3.jpg

1975 ms

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gjsszx-linkzuo.png

2080 ms

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gjsszx-linkyou.png

2079 ms

gjsszx-footer.jpg

gjsszx-footer.jpg

2069 ms

Accessibility Review

english.ntsc.cas.cn accessibility score

61

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

Buttons do not have an accessible name

High

Links do not have a discernible name

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.

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

english.ntsc.cas.cn best practices score

75

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

english.ntsc.cas.cn SEO score

90

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

Links do not have descriptive text

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

    EN

  • Language Claimed

    ZH

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise English.ntsc.cas.cn can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it does not match the claimed Chinese language. Our system also found out that English.ntsc.cas.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

english.ntsc.cas.cn

Open Graph description is not detected on the main page of English Ntsc Cas. 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: