duitang.com

https://duitang.com· First analyzed 01 May 2026· Updated 01 May 2026

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duitang.com

Mobile

Sponsored

Hosting Provider

Hebei Sea Whale Technology Co. Ltd.

IP Address

43.250.34.170

Site Location

🇨🇳 Chinavia ip

Server Location

🇨🇳 Haidian, China

ASN

AS134760

Organization

Hebei Sea Whale Technology Co. Ltd.

Server

Performance

Core Web Vitals

Weight

First Contentful Paint

2.9 s10%

Speed Index

3.8 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

26 KB

203 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Hebei Sea Whale Technology Co. Ltd.

Technology Stack

3 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

CSS Frameworks

Tailwind CSS

SEO Analysis

D43/100

Meta Tags9/15

Content9/12

Headings1/8

Technical8/25

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile2/4

Indexability3/3

duitang.comduitang.com

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Title Length16 chars

Recommended: 50-60 chars (~99px / 580px)

Description Length158 chars

Recommended: 120-160 chars

Issues (3)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (254/254) — critical for accessibility and SEO
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

12 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

9 rules

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.

Sponsored

AI & LLM Readiness

F25/100

Bot Access

20/25

Machine Read.

1/25

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.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:1%

Words:293

Token eff.:Too Short

Sections/1K:3.4

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...

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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.

43/100

Passed

Critical

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

9/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

0/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

6 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.

47/100

A+

3 mg

CO₂e / view

26.4 KB

Page Weight

95%

Cleaner Than

New Visitor

4 mg

Returning (cached)

2 mg

Annual (10K/mo)

396 g

Emission Segments

Data Center

<0.001 g

Network

<0.001 g

Device

2 mg

Resource Breakdown

JavaScript

8.1 KB

HTML

5.2 KB

Other

13.1 KB

Green Hosting Not Verified

Hebei Sea Whale Technology Co. Ltd.

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

46%Poor

Interactive

HTTPS

No WAF

174d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

15.10.2025

Valid Until

22.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.duitang.comduitang.com

SHA-256 Fingerprint

59:31:16:7C:09:0E:66:D0:BE:CB:36:81:74:16:43:A5:3B:C8:67:85...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-language

en-GB

content-type

text/html;charset=utf-8

date

Fri, 01 May 2026 08:06:21 GMT

expires

Thu, 01 Jan 1970 00:00:00 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

duitang.com

Domain Age

15y 12m

Created

06.05.2010

Expires

06.05.2030

Last Updated

23.06.2022

Registrar

DNSPod, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

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.

41/100

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.

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

-apple-system-font + PingFangSC-Semibold

WCAG Partial

53/100

Readability

/30

16/30

16px · LH 1.37

Hierarchy

/20

7/20

WCAG

/25

14/25

2.16:1 min contrast

Performance

/25

16/25

2 fonts

Heading Font

-apple-system-font

Sans

Body Font

PingFangSC-Semibold

Sans16px

Contrast Ratio

2.16:1

24 issues

Reading Comfort

Dual Sans-Serif

left aligned

16px

14px

16px

⚠️ Small text: 16px may strain on mobile. Use ≥16px for WCAG compliance.

⚠️ Tight line spacing (1.37). Increase to 1.4–1.6 for better readability.

⚠️ Partial contrast: 24 elements below WCAG AA threshold (min 2.2:1).

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

✅ Lean font stack: 2 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFonts

Color Palette

10 unique colors

Light

#ffffff

Background· 59.099999999999994%

#fe8a8a

Primary· 13.4%

#9ad8e3

Accent· 9.8%

#8ba285

Secondary· 6%

#9c4c67

Secondary· 4%

#eadbcc

Secondary· 3.4%

#bd7f73

Secondary· 1.6%

#7bccae

Secondary· 1.3%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

10 Resources

Scripts

Styles

Async

Defer

Top Script Sources

a.dtstatic.com(3)googletagmanager.com(2)hmcdn.baidu.com(1)google-analytics.com(1)hm.baidu.com(1)

Website Identity

duitang.com

15 years old

Location detected: 🇨🇳 Chinavia ip

DNSPod, Inc.

Sponsored

Last analyzed: 01 May 2026 at 08:07

Historical Analysis & Change Tracking