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china.com.cn Mobile Performance
41/100
These metrics represent real-world Chrome users experience viewing china.com.cn on mobile devices. Reports are focused on loading performance and other critical factors that most affect user experience. Follow our guide to track, optimize, and improve the quality of your web pages.
User Loading Experience
First Input Delay
Largest Contentful Paint
Cumulative Layout Shift
First Contentful Paint
Metrics
Largest Contentful Paint0/100 12.9 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Speed Index1/100 14.7 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Time to Interactive16/100 12.2 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
First Contentful Paint56/100 3.7 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Total Blocking Time100/100 10 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Cumulative Layout Shift100/100 0
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Should Fix (13)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Reduce initial server response time
Root document took 6,190 ms
5,586 ms
Use video formats for animated content
Potential savings of 56 KiB
750 ms
Serve images in next-gen formats
Potential savings of 90 KiB
750 ms
Eliminate render-blocking resources
Potential savings of 570 ms
569 ms
Remove unused JavaScript
Potential savings of 27 KiB
300 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Serve static assets with an efficient cache policy
89 resources found
Avoid `document.write()`
Avoid enormous network payloads
Total size was 3,959 KiB
Minimizes main-thread work
1.9 s
Largest Contentful Paint element
1 element found
Avoid chaining critical requests
17 chains found
Avoid long main-thread tasks
2 long tasks found
Keep request counts low and transfer sizes small
133 requests • 3,959 KiB
Passed Audits (14)
Efficiently encode images
Enable text compression
Preload key requests
Preconnect to required origins
Minify CSS
Avoid multiple page redirects
JavaScript execution time
0.1 s
All text remains visible during webfont loads
Defer offscreen images
Properly size images
Minify JavaScript
Potential savings of 6 KiB
Avoids an excessive DOM size
508 elements
Remove unused CSS
Uses passive listeners to improve scrolling performance
china.com.cn Mobile SEO
83/100
These checks ensure that your page is optimized for search engine results ranking. There are additional factors Lighthouse does not check that may affect your search ranking. Learn more. Run these additional validators on your site to check additional SEO best practices.
Should Fix (2)
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Image elements do not have `[alt]` attributes
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Links are not crawlable
Passed Audits (10)
Document has a `<title>` element
Document avoids plugins
Page has successful HTTP status code
Document has a valid `hreflang`
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Document uses legible font sizes
63.85% legible text
Links have descriptive text
Document has a meta description
Tap targets are sized appropriately
100% appropriately sized tap targets
Page isn’t blocked from indexing
china.com.cn Mobile Best Practices
62/100
These checks highlight opportunities to improve the overall code health of china.com.cn mobile page. Current recommendations will help to make your page fast and secure, to create a good user experience and to avoid deprecated technologies.
Should Fix (5)
General
Browser errors were logged to the console
Trust and Safety
Does not use HTTPS
131 insecure requests found
Includes front-end JavaScript libraries with known security vulnerabilities
1 vulnerability detected
Links to cross-origin destinations are unsafe
User Experience
Serves images with low resolution
Passed Audits (9)
Avoids requesting the geolocation permission on page load
Allows users to paste into password fields
Detected JavaScript libraries
Page has the HTML doctype
Avoids requesting the notification permission on page load
Avoids deprecated APIs
Properly defines charset
Avoids Application Cache
Displays images with correct aspect ratio
china.com.cn Mobile Progressive Web App
18/100
These checks validate the aspects of a Progressive Web App. Learn more. These checks are required by the baseline PWA Checklist but are not automatically checked by Lighthouse. They do not affect your score but it's important that you verify them manually.
Should Fix (10)
PWA Optimized
Does not set a theme color for the address bar.
Is not configured for a custom splash screen
Manifest doesn't have a maskable icon
Does not redirect HTTP traffic to HTTPS
Fast and reliable
Current page does not respond with a 200 when offline
`start_url` does not respond with a 200 when offline
Page load is not fast enough on mobile networks
Interactive at 12.2 s
Installable
Does not use HTTPS
131 insecure requests found
Does not register a service worker that controls page and `start_url`
Web app manifest does not meet the installability requirements
Passed Audits (4)
Content is sized correctly for the viewport
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Provides a valid `apple-touch-icon`
Contains some content when JavaScript is not available
china.com.cn Mobile Accessibility
37/100
These checks highlight opportunities to improve the accessibility of your web app. Only a subset of accessibility issues can be automatically detected so manual testing is also encouraged. These items address areas which an automated testing tool cannot cover. Learn more in our guide on conducting an accessibility review.
Should Fix (7)
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.
Form elements do not have associated labels
Links do not have a discernible name
Image elements do not have `[alt]` attributes
Tables and lists
These are opportunities to to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Lists do not contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
The page does not contain a heading, skip link, or landmark region
Best practices
These items highlight common accessibility best practices.
`[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5.
Passed Audits (6)
Document has a `<title>` element
`<html>` element has a `[lang]` attribute
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
`[id]` attributes on active, focusable elements are unique
`[aria-hidden="true"]` is not present on the document `<body>`
`<html>` element has a valid value for its `[lang]` attribute
Mobile Usability
100/100
These checks validate how easily a visitor can use china.com.cn on a mobile device. Test results include a list of any mobile usability problems. Mobile usability problems are issues that can affect a user that visits the page on a mobile (small screen) device, including small font sizes (which are hard to read on a small screen).
Passed Audits (6)
Avoid app install interstitials that hide content
Avoid plugins
Configure the viewport
Size content to viewport
Size tap targets appropriately
Use legible font sizes
Mobile Speed
59/100
These checks analyze the performance of china.com.cn on mobile devices and return PageSpeed score and information on how to improve the load time. What makes a good Progressive Web App?
Should Fix (6)
Avoid landing page redirects
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Leverage browser caching
Optimize images
Enable compression
Minify JavaScript
Passed Audits (4)
Reduce server response time
Minify CSS
Minify HTML
Prioritize visible content
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