a5.cn

https://a5.cn· First analyzed 04 Jun 2026· Updated 04 Jun 2026

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a5.cn

Mobile

Sponsored

Hosting Provider

Beijing Baidu Netcom Science and Technology Co., Ltd.

IP Address

180.76.154.198

Site Location

🇨🇳 Chinavia tld

Server Location

🇨🇳 Beijing, China

ASN

AS38365

Organization

Beijing Baidu Netcom Science and Technology Co., Ltd.

Server

Nginx

Nameservers

ns2.alidns.com.ns1.alidns.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

3.2 s10%

Speed Index

4.1 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

388 KB

21 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Beijing Baidu Netcom Science and Technology Co., Ltd.

Technology Stack

3 Technologies Detected

Libraries

jQueryv3.4.1

CSS Frameworks

Tailwind CSS

Web Servers

Nginxv1.20.1

SEO Analysis

F39/100

Meta Tags5/15

Content8/12

Headings0/8

Technical8/25

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

a5.cna5.cn

A5交易-虚拟资产投资交易中心-徐州八方网络科技有限公司

A5交易（www.a5.cn），互联网资源交易平台，提供域名网站、新媒体、商标、网店等交易服务。

Title Length28 chars

Recommended: 50-60 chars (~173px / 580px)

Description Length48 chars

Recommended: 120-160 chars

Issues (3)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (14/14) — critical for accessibility and SEO
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

14 issues found

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Crawlability

Sitemap

robots.txt

19 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

F29/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

0/25

Citation

2/25

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:8%

Words:521

Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headings

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.

45/100

Passed

Critical

Warnings

Images & Alt Text

5/20

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

Semantic Structure

3/20

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

3/15

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.

52/100

48 mg

CO₂e / view

387.6 KB

Page Weight

90%

Cleaner Than

New Visitor

55 mg

Returning (cached)

27 mg

Annual (10K/mo)

5.7 kg

Emission Segments

Data Center

11 mg

Network

12 mg

Device

26 mg

Resource Breakdown

JavaScript

123.5 KB

Images

55.1 KB

CSS

200.1 KB

HTML

8.1 KB

Other

923 B

Green Hosting Not Verified

Beijing Baidu Netcom Science and Technology Co., Ltd.

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

130d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

WoTrus CA Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

12.10.2025

Valid Until

12.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.a5.cna5.cn

SHA-256 Fingerprint

81:6F:80:90:B3:7D:74:16:36:F9:28:D0:D9:10:5A:BB:08:FC:37:E4...

Top Recommendations

Security recommendation preview

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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, 04 Jun 2026 13:14:10 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mail.a5.cn

Domain Information

a5.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.

38/100

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...

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Typography & Readability

Arial

WCAG Partial

57/100

Readability

/30

14/30

12px · LH --

Hierarchy

/20

8/20

WCAG

/25

16/25

1.59:1 min contrast

Performance

/25

19/25

System fonts

Heading Font

Arial

Body Font

Arial

Sans12px

Contrast Ratio

1.59:1

24 issues

Reading Comfort

Single Family

left aligned

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

✅ Easy to read: Flesch score 95/100 — accessible to general audiences.

⚠️ Partial contrast: 24 elements below WCAG AA threshold (min 1.6:1).

✅ System fonts: Zero font loading delay — best possible LCP impact.

Flesch 95

Color Palette

7 unique colors

Light

#ffffff

Background· 24.3%

#b2e4ff

Primary· 55.2%

#897171

Secondary· 5.5%

#3c4f70

Secondary· 5%

#60add0

Accent· 4.6%

#aab6c1

Secondary· 4.4%

#d9f2fc

Accent· 1%

Sponsored

Scripts & Styles

6 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(3)hm.baidu.com(1)

Website Identity

a5.cn

Location detected: 🇨🇳 Chinavia tld

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Last analyzed: 04 Jun 2026 at 13:14

Historical Analysis & Change Tracking