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learnblockchain.cn

https://learnblockchain.cn· First analyzed 28 May 2026· Updated 28 May 2026
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learnblockchain.cn
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Mobile

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Hosting Provider

Chinanet CQ

IP Address

219.153.159.131

Site Location

🇨🇳 Chinavia schema_nap

Server Location

🇨🇳 Chongqing, China

ASN

AS134420

Organization

Chinanet CQ

Server

ESA

Nameservers

baringo.ns.atrustdns.com.pennines.ns.atrustdns.com.

Performance

79

Core Web Vitals

Weight

First Contentful Paint
2.4 s10%
Speed Index
3.1 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
129 KB
55 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
Infrastructure
Hosting
Chinanet CQ

Technology Stack

4 Technologies Detected

CSS Frameworks

2
Bootstrap
Tailwind CSS

Libraries

1
jQuery

Icon Libraries

1
Font Awesome

SEO Analysis

D59/100
17
9
1
Meta Tags5/15
Content10/12
Headings1/8
Technical17/21
E-E-A-T5/7
Images2/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile1/4
Indexability3/3
L
learnblockchain.cnlearnblockchain.cn

登链社区 - Web3 开发者社区

区块链技术爱好者的家园

Title Length17 chars

Recommended: 50-60 chars (~108px / 580px)

Description Length11 chars

Recommended: 120-160 chars

Issues (1)

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

10 issues found

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Local SEO

Local Search Readiness

17/100
Poor
4 16

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

D46/100
Bot Access
20/25
Machine Read.
8/25
Schema Data
7/25
Citation
11/25

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. listsnav
Text ratio:3%
Words:289
Token eff.:Too Short
Depth:2/5

Structured Data

2 JSON-LD
Organization×1.1WebSiteSearchAction
sameAs entity links

Citation Readiness

Opening Summary251w
Descriptive Headings
Canonical URL
Open Graph3/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
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.
B
71/100
10
Passed
5
Critical
1
Warnings
Images & Alt Text
15/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
12/20
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
10/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
4 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.
52/100
A+
16 mg
CO₂e / view
128.6 KB
Page Weight
95%
Cleaner Than
New Visitor
18 mg
vs
Returning (cached)
9 mg
Annual (10K/mo)
1.9 kg
Emission Segments
Data Center
4 mg
Network
4 mg
Device
9 mg
Resource Breakdown
JavaScript
8.4 KB
CSS
105.2 KB
HTML
15.0 KB
Green Hosting Not Verified
Chinanet CQ
4 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

153d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Beijing Xinchacha Credit Management Co., Ltd.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

29.09.2025

Valid Until

29.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.learnblockchain.cnlearnblockchain.cn

SHA-256 Fingerprint

33:0B:1D:11:F5:87:B8:D6:44:C0:89:85:E8:9A:26:00:40:1B:B9:C1...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control
🔴 No Cache(no-cache, no-store)
content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=utf-8
date
Thu, 28 May 2026 20:45:13 GMT
eagleid
db999f1517800011134161803e
pragma
no-cache
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

0

SPF
DKIM
DMARC

Domain Information

learnblockchain.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.
B
73/100
Mobile Friendly9 breakpoints
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...
Upgrade to view recommendations

Typography & Readability

PingFang SC

WCAG Partial
61/100
Readability
/30
18/30

14px · LH 1.43

Hierarchy
/20
14/20

2.57x ratio

WCAG
/25
16/25

2.57:1 min contrast

Performance
/25
13/25

1 font · 1 req

Heading Font

PingFang SC

Sans36px

Body Font

PingFang SC

Sans14px

Contrast Ratio

2.57:1

14 issues

Reading Comfort

Single Font Family

left aligned
36px
h1
18px
h4
14px
p

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

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

❌ Very complex text: Flesch score 8/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 14 elements below WCAG AA threshold (min 2.6:1).

✅ Strong hierarchy: Headlines are 2.6x larger than body text.

⚠️ Fluid type without rem: clamp() detected but missing rem units. May fail WCAG 1.4.4 zoom test.

Buy on MyFontsFluid TypeFlesch 8

Color Palette

13 unique colors
16.66:1 AAA Light
#ffffff
Background· 39.5%
#1e1e1f
Other· 7.6%
#0967c7
Primary· 9.4%
#0d7ad4
Accent· 8.1%
#4aa7e5
Accent· 6.7%
#1d93e3
Accent· 4.8%
#c3ccd0
Secondary· 4.5%
#baafa7
Secondary· 4.5%

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

9 Resources

5
Scripts
4
Styles
1
Async
0
Defer

Top Script Sources

img.learnblockchain.cn(2)c.cnzz.com(1)s22.cnzz.com(1)learnblockchain.cn(1)

Website Identity

登链社区

登链社区

Organization

登链社区是中文 Web3 开发者社区与学习平台，成立于2017年，是中文里最大，最受欢迎的区块链学习网站，提供区块链与 Web3 相关的技术文章、开发问答、系统课程、视频、专栏、文档、知识图谱、线上培训，线下训练营、活动、工作机会与开发资源。内容覆盖 Ethereum、EVM、Solana、Bitcoin、Move、TON、DeFi、区块链安全、零知识证明、钱包开发、链上数据分析等主题

learnblockchain.cn/
Location detected: 🇨🇳 Chinavia schema_nap

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Last analyzed: 28 May 2026 at 20:45

Historical Analysis & Change Tracking

learnblockchain.cn Technology Stack - Built With jQuery, Bootstrap, Tailwind CSS, Font Awesome | StackOptic | StackOptic