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cadal.edu.cn

https://cadal.edu.cn· First analyzed 31 May 2026· Updated 31 May 2026
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cadal.edu.cn
Desktop screenshot of cadal.edu.cn
Mobile screenshot of cadal.edu.cn
Mobile

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Hosting Provider

CERNET

IP Address

210.32.4.91

Site Location

🇨🇳 Chinavia tld

Server Location

🇨🇳 Haidian, China

ASN

AS4538

Nameservers

ldns.zju.edu.cn.

Performance

74

Core Web Vitals

Weight

First Contentful Paint
3.8 s10%
Speed Index
5.0 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
13.1 MB
75 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
CERNET

Technology Stack

4 Technologies Detected

Libraries

2
jQueryv3.4.1
jQuery UI

UI Components

1
Swiper

CSS Frameworks

1
Tailwind CSS

SEO Analysis

F39/100
10
11
3
Meta Tags4/15
Content10/12
Headings3/8
Technical8/21
E-E-A-T0/7
Images1/7
Links4/5
URL5/5
Social0/5
Freshness0/4
Mobile1/4
Indexability3/3
C
cadal.edu.cncadal.edu.cn

大学数字图书馆国际合作计划

No description available for this page.

Title Length13 chars

Recommended: 50-60 chars (~80px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

  • • Missing meta description — important for click-through rates in SERPs
  • • Missing H1 tag — every page should have exactly one H1
  • • Most images missing alt text (87/87) — critical for accessibility and SEO

14 issues found

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Local SEO

Local Search Readiness

0/100
Poor
15 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

F37/100
Bot Access
20/25
Machine Read.
13/25
Schema Data
0/25
Citation
4/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txtinvalid
llms-full.txt
Semantic HTML
Heading Hierarchy
def. lists
Text ratio:2%
Words:565
Token eff.:Optimal
Sections/1K:1.8
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headingsavg 1.2w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (12)
AI readiness recommendation preview...
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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
D
40/100
4
Passed
8
Critical
1
Warnings
Images & Alt Text
5/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
4/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
10/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
5/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
1/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
5 recommendations
  • •Accessibility recommendation preview...
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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
12/100
F
1.66 g
CO₂e / view
13.1 MB
Page Weight
5%
Cleaner Than
New Visitor
1.90 g
vs
Returning (cached)
948 mg
Annual (10K/mo)
199.0 kg
Emission Segments
Data Center
370 mg
Network
398 mg
Device
890 mg
Resource Breakdown
JavaScript
719.6 KB
Images
1.2 MB
CSS
1.9 MB
HTML
29.2 KB
Other
9.3 MB
Green Hosting Not Verified
CERNET
8 recommendations
  • •Carbon footprint recommendation preview...
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F

Security Score

0%Critical
Critical / Transactional

HTTPS

No WAF

41d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-384 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

10.06.2025

Valid Until

11.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.cadal.edu.cncadal.edu.cn

SHA-256 Fingerprint

CD:40:51:B8:F4:0F:53:19:2F:38:FE:5C:4B:19:57:76:8C:4E:4A:FF...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection
keep-alive
content-encoding
📦 Gzip(gzip)
content-language
zh
content-type
text/html;charset=UTF-8
date
Sun, 31 May 2026 16:20:18 GMT
transfer-encoding
chunked
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

0

SPF
DKIM
DMARC

Domain Information

cadal.edu.cn

DNSSEC
Not Enabled

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
D
48/100
Not Mobile Friendly1 breakpoint
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
Viewport
width=device-width,initial-scale=1,user-scalable=no
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Microsoft Yahei

WCAG Partial
46/100
Readability
/30
9/30

12px · LH 2.17

Hierarchy
/20
7/20
WCAG
/25
14/25

1:1 min contrast

Performance
/25
16/25

1 font

Heading Font

Microsoft Yahei

Sans

Body Font

Microsoft Yahei

Sans12px

Contrast Ratio

1:1

21 issues

Reading Comfort

~46 CPL

Optimal (45–75)
16px
h2
36px
h3
12px
p

❌ Critical: 12px body text is too small. Minimum 14px, recommend 16px+.

⚠️ Wide line spacing (2.17). 1.4–1.6 is optimal for body text.

✅ Optimal line length: ~46 chars/line (ideal 45–75 CPL).

⚠️ Partial contrast: 21 elements below WCAG AA threshold (min 1.0:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

✅ Lean font stack: 1 font families keeps load times fast.

Buy on MyFonts

Color Palette

6 unique colors
Light
#00223b
Primary· 47.6%
#001326
Accent· 20.5%
#003353
Accent· 15.899999999999999%
#0f435f
Accent· 5.9%
#c0ced4
Secondary· 5.4%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

19 Resources

13
Scripts
6
Styles
0
Async
0
Defer

Top Script Sources

local(13)

Website Identity

cadal.edu.cn

Location detected: 🇨🇳 Chinavia tld

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Last analyzed: 31 May 2026 at 16:21

Historical Analysis & Change Tracking