dffl.com.cn

https://dffl.com.cn· First analyzed 29 Apr 2026· Updated 29 Apr 2026

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dffl.com.cn

Mobile

Sponsored

Hosting Provider

China Mobile

IP Address

223.76.216.216

Site Location

🇨🇳 Chinavia tld

Server Location

🇨🇳 Wuhan, China

ASN

AS9808

Organization

China Mobile

Nameservers

dns-ch.xinnet.com.dns-ch2.xinnet.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

3.1 s10%

Speed Index

4.0 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.5 MB

22 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

China Mobile

Technology Stack

4 Technologies Detected

Libraries

CSS Frameworks

SEO Analysis

D42/100

Meta Tags5/15

Content8/12

Headings1/8

Technical10/21

E-E-A-T0/7

Images2/7

Links4/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

dffl.com.cndffl.com.cn

东风锻造有限公司

Title Length8 chars

Recommended: 50-60 chars (~49px / 580px)

Description Length8 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag — every page should have exactly one H1

12 issues found

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Local SEO

Local Search Readiness

6/100

Poor

2 13 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

F27/100

Bot Access

20/25

Machine Read.

2/25

Schema Data

0/25

Citation

5/25

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

nav

Text ratio:6%

Words:63

Token eff.:Too Short

Sections/1K:20

Depth:1/5

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...

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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.

61/100

Passed

Critical

Warnings

Images & Alt Text

10/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

9/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

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

3/15

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

3 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.

30/100

193 mg

CO₂e / view

1.5 MB

Page Weight

60%

Cleaner Than

New Visitor

221 mg

Returning (cached)

110 mg

Annual (10K/mo)

23.2 kg

Emission Segments

Data Center

43 mg

Network

46 mg

Device

104 mg

Resource Breakdown

JavaScript

409.6 KB

Images

886.0 KB

CSS

255.5 KB

HTML

11.0 KB

Green Hosting Not Verified

China Mobile

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

71%Good

Static / Informational

HTTPS

No WAF

62d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

18.06.2025

Valid Until

30.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.dffl.com.cndffl.com.cn

SHA-256 Fingerprint

B8:97:9A:64:03:24:EC:D3:9A:EE:66:DF:D3:C3:AF:69:05:3E:56:ED...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟣 Private(private)

connection

keep-alive

content-length

10972

content-type

text/html; charset=utf-8

date

Wed, 29 Apr 2026 22:54:26 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

smtp.dffl.com.cn

Domain Information

dffl.com.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.

57/100

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

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

微软雅黑

WCAG Partial

56/100

Readability

/30

20/30

14px · LH 1.43

Hierarchy

/20

7/20

WCAG

/25

16/25

1.53:1 min contrast

Performance

/25

13/25

1 font · 2 req

Heading Font

微软雅黑

Sans

Body Font

微软雅黑

Sans14px

Contrast Ratio

1.53:1

21 issues

Reading Comfort

Single Font Family

left aligned

15px

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.43 ratio (ideal range 1.4–1.6).

⚠️ Partial contrast: 21 elements below WCAG AA threshold (min 1.5:1).

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

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

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

Buy on MyFonts

Color Palette

11 unique colors

6.49:1 AA Light

#ffffff

Background· 47.300000000000004%

#5b6050

Secondary· 4.3%

#024f91

Primary· 6.5%

#97c7d7

Secondary· 6.4%

#142822

Secondary· 6.3%

#393d2b

Secondary· 5.3%

#547f72

Secondary· 5%

#d1dbdb

Secondary· 4.8%

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Scripts & Styles

9 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(5)

Website Identity

dffl.com.cn

Location detected: 🇨🇳 Chinavia tld

zh-CN

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Last analyzed: 29 Apr 2026 at 23:09

Historical Analysis & Change Tracking