StackOptic
Back to Search
sudu.cn favicon

sudu.cn

https://sudu.cn· First analyzed 21 May 2026· Updated 21 May 2026
Export
sudu.cn
Desktop screenshot of sudu.cn
Mobile screenshot of sudu.cn
Mobile

Sponsored

Hosting Provider

Chinanet SC

IP Address

220.167.104.21

Site Location

🇨🇳 Chinavia tld

Server Location

🇨🇳 Deyang, China

ASN

AS38283

Organization

Chinanet SC

Server

OpenResty

Nameservers

brilliant.dnspod.net.lemon.dnspod.net.

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%
2.3 MB
83 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
Infrastructure
Hosting
Chinanet SC

Technology Stack

7 Technologies Detected

Libraries

2
jQueryv1.4.2
jQuery UI

CSS Frameworks

2
Bootstrap
Tailwind CSS

Icon Libraries

1
Font Awesome

Web Servers

1
OpenRestyv1.15.8.3

Languages

1
PHPv7.4.33

SEO Analysis

D56/100
14
11
2
Meta Tags14/15
Content9/12
Headings5/8
Technical10/25
E-E-A-T3/7
Images1/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile1/4
Indexability3/3
S
sudu.cnsudu.cn

华夏名网-专业的域名主机服务商,提供域名注册,虚拟主机,云主机,邮局,服务器租用托管等

华夏名网拥有24年虚拟主机、域名注册的运营经验，是ICANN&CNNIC双认证域名注册商，是国内领先的互联网基础服务提供商。提供虚拟主机,域名注册,Linux主机,linux虚拟主机,VPS主机,云主机,香港VPS,免费主机,无限主机,服务器租用,服务器托管等，我们以高性价比、一流服务和强大的管理功能赢得数十万客户！

Title Length43 chars

Recommended: 50-60 chars (~255px / 580px)

Description Length159 chars

Recommended: 120-160 chars

Issues (2)

  • • Most images missing alt text (37/49) — critical for accessibility and SEO
  • • Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

13 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

181 URLs

robots.txt

19 rules

Sitemap reference found

Local SEO

Local Search Readiness

3/100
Poor
1 14 2

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

Sponsored

AI & LLM Readiness

F32/100
Bot Access
20/25
Machine Read.
9/25
Schema Data
0/25
Citation
3/25

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.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
def. listsnav
Text ratio:4%
Words:390
Token eff.:Optimal
Sections/1K:66.7
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headingsavg 1w
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...
Upgrade to view recommendations

Sponsored

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
43/100
3
Passed
7
Critical
1
Warnings
Images & Alt Text
10/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
8/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
5/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
14/15
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.
4 recommendations
  • •Accessibility recommendation preview...
Upgrade to view recommendations

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.
15/100
E
295 mg
CO₂e / view
2.3 MB
Page Weight
30%
Cleaner Than
New Visitor
338 mg
vs
Returning (cached)
169 mg
Annual (10K/mo)
35.4 kg
Emission Segments
Data Center
66 mg
Network
71 mg
Device
159 mg
Resource Breakdown
JavaScript
163.5 KB
Images
1.9 MB
CSS
305.1 KB
HTML
18.2 KB
Green Hosting Not Verified
Chinanet SC
7 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

141d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Asseco Data Systems S.A.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

25.03.2026

Valid Until

10.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.sudu.cnsudu.cn

SHA-256 Fingerprint

1A:E1:83:61:AC:4D:E5:57:7F:C7:22:5C:5E:E9:F3:F2:75:96:2E:B1...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

cache-control
🔴 No Cache(no-store, no-cache, must-revalidate)
connection
keep-alive
content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=UTF-8
date
Thu, 21 May 2026 09:06:19 GMT
expires
Thu, 19 Nov 1981 08:52:00 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

65

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

mxbiz1.qq.com
mxbiz2.qq.com

Domain Information

sudu.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.
F
39/100
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.
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Microsoft YaHei

WCAG Partial
61/100
Readability
/30
20/30

16px · LH 1.88

Hierarchy
/20
11/20

2.25x ratio

WCAG
/25
17/25

2.44:1 min contrast

Performance
/25
13/25

1 font · 1 req

Heading Font

Microsoft YaHei

Sans36px

Body Font

Microsoft YaHei

Sans16px

Contrast Ratio

2.44:1

19 issues

Reading Comfort

~77 CPL

Wide lines
36px
h1
20px
h2
18px
h3
20px
h4
16px
p

✅ Excellent readability: 16px body text is ideal for all devices.

⚠️ Wide line spacing (1.88). 1.4–1.6 is optimal for body text.

⚠️ Wide lines: ~77 chars/line. Use max-width: 65ch for comfortable reading.

✅ Easy to read: Flesch score 90/100 — accessible to general audiences.

⚠️ Partial contrast: 19 elements below WCAG AA threshold (min 2.4:1).

⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

Buy on MyFontsFlesch 90

Color Palette

9 unique colors
Light
#ffffff
Background· 43.2%
#0e28c1
Primary· 9.2%
#111844
Accent· 8.1%
#092e5a
Accent· 5.4%
#3fa7de
Accent· 5.4%
#1646bb
Accent· 5.1%
#485ba3
Secondary· 2.4%

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

Sponsored

Scripts & Styles

23 Resources

13
Scripts
10
Styles
1
Async
0
Defer

Top Script Sources

local(9)www30c1.53kf.com(2)accwww30c1.53kf.com(1)tb.53kf.com(1)

Website Identity

sudu.cn

Location detected: 🇨🇳 Chinavia tld

Sponsored

Last analyzed: 21 May 2026 at 09:06

Historical Analysis & Change Tracking