51yuansu.com

https://51yuansu.com· First analyzed 13 May 2026· Updated 13 May 2026

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51yuansu.com

Mobile

Sponsored

Hosting Provider

Alibaba Cloud

alibabacloud.com

IP Address

114.215.182.247

Site Location

🇨🇳 Chinavia ip

Server Location

🇨🇳 Hangzhou, China

ASN

AS37963

Organization

Alibaba.com LLC

Server

Nginx

Nameservers

dns9.hichina.com.dns10.hichina.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.1 s10%

Speed Index

1.5 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

3 KB

2 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Alibaba Cloud

Technology Stack

2 Technologies Detected

Libraries

jQueryv3.6.4

Web Servers

Nginx

SEO Analysis

F27/100

Meta Tags4/15

Content0/12

Headings0/8

Technical14/25

E-E-A-T0/7

Images0/7

Links0/5

URL5/5

Social0/5

Freshness0/4

Mobile1/4

Indexability3/3

51yuansu.com51yuansu.com

安全验证

No description available for this page.

Title Length4 chars

Recommended: 50-60 chars (~24px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

• Missing meta description — important for click-through rates in SERPs
• Very thin content (3 words). Search engines need substantial content for ranking.
• Missing H1 tag — every page should have exactly one H1

12 issues found

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Crawlability

Sitemap

Type: index

200 URLs

200 sub-sitemaps

robots.txt

17 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

F23/100

Bot Access

20/25

Machine Read.

1/25

Schema Data

0/25

Citation

2/25

AI Bot Access

13/14 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:0%

Words:2

Token eff.:Too Short

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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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.

66/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

6/20

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

1/15

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

2 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.

56/100

A+

<0.001 g

CO₂e / view

3.2 KB

Page Weight

95%

Cleaner Than

New Visitor

<0.001 g

Returning (cached)

<0.001 g

Annual (10K/mo)

48 g

Emission Segments

Data Center

<0.001 g

Network

<0.001 g

Device

<0.001 g

Resource Breakdown

HTML

3.2 KB

Green Hosting Not Verified

Alibaba Cloud

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

61%Fair

Interactive

HTTPS

No WAF

76d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

TrustAsia Technologies, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

30.04.2026

Valid Until

28.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

51yuansu.comwww.51yuansu.com

SHA-256 Fingerprint

77:A7:2B:E1:CD:B0:DE:1B:C1:41:B7:14:65:5D:7E:A2:3B:B6:63:72...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Wed, 13 May 2026 17:51:50 GMT

referrer-policy

strict-origin-when-cross-origin

server

nginx

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

51yuansu.com

Domain Age

10y 2m

Created

04.03.2016

Expires

04.03.2028

Last Updated

02.02.2024

Registrar

Alibaba Cloud Computing (Beijing) Co., Ltd.

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.

51/100

Mobile Friendly

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=1.0, user-scalable=no

4 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Arial

69/100

Readability

/30

21/30

16px · LH --

Hierarchy

/20

9/20

WCAG

/25

19/25

Performance

/25

20/25

System fonts

Heading Font

Arial

Body Font

Arial

Sans16px

Contrast Ratio

Reading Comfort

Single Family

left aligned

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

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

Color Palette

2 unique colors

Light

#f5f5f5

Background· 99.49999999999999%

#9ebbc7

Primary· 0.3%

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Scripts & Styles

1 Resources

Scripts

Styles

Async

Defer

Top Script Sources

code.jquery.com(1)

Website Identity

51yuansu.com

10 years old

Location detected: 🇨🇳 Chinavia ip

Alibaba Cloud Computing (Beijing) Co., Ltd.zh-CN

Sponsored

Last analyzed: 13 May 2026 at 17:52

Historical Analysis & Change Tracking