Tools & Wizards About Us

Report Summary

  • 38

    Performance

    Renders faster than
    57% of other websites

  • 59

    Accessibility

    Visual factors better than
    that of 26% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

kepu.net.cn

中国科普博览

Page Load Speed

27.9 sec in total

First Response

2.9 sec

Resources Loaded

24.3 sec

Page Rendered

757 ms

About Website

Visit kepu.net.cn now to see the best up-to-date Kepu content for China and also check out these interesting facts you probably never knew about kepu.net.cn

中国科普博览（简称博览），中国科学院权威出品、专业打造的中科院科普云平台，提供高品质的科普教育与科学文化服务， 共享人类科学，与科学同行。博览以科研为依托，汇聚百余所科研机构的高端科学资源，聚焦国内外前沿科技和科学突破；以专业为基 础，云集千余位各科学领域的科学大家，洞察热点和生活中的科学真相；以创新为引领，讲述当代科技、教育与文化等领域创新的非凡 思想和生命故事，传播有温度有态度的新科学观。

Visit kepu.net.cn

Key Findings

We analyzed Kepu.net.cn page load time and found that the first response time was 2.9 sec and then it took 25 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 was 1 request timeout, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

kepu.net.cn performance score

38

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

34/100

10%

LCP (Largest Contentful Paint)

Value5.8 s

15/100

25%

SI (Speed Index)

Value21.1 s

0/100

10%

TBT (Total Blocking Time)

Value550 ms

54/100

30%

CLS (Cumulative Layout Shift)

Value0.006

100/100

15%

TTI (Time to Interactive)

Value28.3 s

0/100

10%

Network Requests Diagram

kepu.net.cn

2879 ms

swiper.3.4.2.min.css

506 ms

index-kepu22.css

508 ms

player.js

1029 ms

keputop_2024_7.js

796 ms

Our browser made a total of 135 requests to load all elements on the main page. We found that 73% of them (99 requests) were addressed to the original Kepu.net.cn, 6% (8 requests) were made to Img.t.sinajs.cn and 4% (6 requests) were made to Wx2.sinaimg.cn. The less responsive or slowest element that took the longest time to load (20.3 sec) relates to the external source Dcs.conac.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 762.4 kB (5%)

Content Size

15.9 MB

After Optimization

15.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Kepu.net.cn main page is 15.9 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. 65% of websites need less resources to load. Images take 15.4 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 106.8 kB

  • Original 128.2 kB
  • After minification 109.4 kB
  • After compression 21.4 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 18.8 kB, which is 15% 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 106.8 kB or 83% of the original size.

Image Optimization

-4%

Potential reduce by 539.1 kB

  • Original 15.4 MB
  • After minification 14.9 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. Kepu images are well optimized though.

JavaScript Optimization

-23%

Potential reduce by 57.2 kB

  • Original 246.3 kB
  • After minification 246.3 kB
  • After compression 189.1 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 57.2 kB or 23% of the original size.

CSS Optimization

-43%

Potential reduce by 59.4 kB

  • Original 136.5 kB
  • After minification 136.5 kB
  • After compression 77.2 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. Kepu.net.cn needs all CSS files to be minified and compressed as it can save up to 59.4 kB or 43% of the original size.

Requests Breakdown

Number of requests can be reduced by 33 (25%)

Requests Now

133

After Optimization

100

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 133 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Kepu. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and from 12 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

kepu.net.cn accessibility score

59

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

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

kepu.net.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

kepu.net.cn SEO score

91

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

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

    EN

  • Encoding

    UTF-8

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

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