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youlecn.com

https://youlecn.com· First analyzed 22 May 2026· Updated 22 May 2026
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youlecn.com
Desktop screenshot of youlecn.com
Mobile screenshot of youlecn.com
Mobile

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Hosting Provider

Chengdu west dimension digital technology Co., LTD

IP Address

211.149.140.219

Site Location

🇨🇳 Chinavia ip

Server Location

🇨🇳 Haidian, China

ASN

AS38283

Organization

Chengdu west dimension digital technology Co., LTD

Server

wts

Performance

83

Core Web Vitals

Weight

First Contentful Paint
1.9 s10%
Speed Index
2.5 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2.1 MB
49 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Chengdu west dimension digital technology Co., LTD

Technology Stack

2 Technologies Detected

Libraries

1
jQueryv1.11.0

CSS Frameworks

1
Tailwind CSS

SEO Analysis

D48/100
12
9
2
Meta Tags12/15
Content8/12
Headings0/8
Technical10/25
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
Y
youlecn.comyoulecn.com

接线端子|PCB接线端子|轨道式接线端子排-上海有乐电气有限公司

上海有乐电气有限公司于2000年在上海成立，专业致力于中、高档接线端子制造和销售。产品有框式压线端子、板式压线端子、弹簧式压线端子及线路板端子等各种类型，覆盖了几十种系列，上千种规格。公司通过ISQ9001:2000质量体系认证，产品通过CE安全认证、广泛应用在电力、电子、电信、交通运输、工业自动化诸多领域。

Title Length32 chars

Recommended: 50-60 chars (~194px / 580px)

Description Length155 chars

Recommended: 120-160 chars

Issues (2)

  • • Missing H1 tag — every page should have exactly one H1
  • • Most images missing alt text (27/29) — critical for accessibility and SEO

11 issues found

Upgrade to view details

Crawlability

Sitemap
robots.txt

23 rules

Local SEO

Local Search Readiness

5/100
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

F26/100
Bot Access
20/25
Machine Read.
4/25
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
def. lists
Text ratio:8%
Words:96
Token eff.:Too Short
Depth:1/5

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 (11)
AI readiness recommendation preview...
Upgrade to view recommendations

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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.
D
43/100
5
Passed
6
Critical
1
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
1/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
5 recommendations
  • •Accessibility recommendation preview...
Upgrade to view recommendations

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.
27/100
D
261 mg
CO₂e / view
2.1 MB
Page Weight
50%
Cleaner Than
New Visitor
298 mg
vs
Returning (cached)
149 mg
Annual (10K/mo)
31.3 kg
Emission Segments
Data Center
58 mg
Network
63 mg
Device
140 mg
Resource Breakdown
JavaScript
39.6 KB
Images
1.5 MB
CSS
546.4 KB
HTML
5.4 KB
Green Hosting Not Verified
Chengdu west dimension digital technology Co., LTD
5 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
D

Security Score

41%Poor
Interactive

HTTPS

No WAF

42d

Certificate Details

Type

Domain Validated (DV)

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

04.04.2026

Valid Until

03.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

youlecn.comwww.youlecn.com

SHA-256 Fingerprint

6A:1F:58:7A:8A:A6:E6:7F:0A:8B:AB:EC:9F:38:6E:37:EF:F5:B6:A1...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control
🟣 Private(private)
connection
keep-alive
content-encoding
📦 Gzip(gzip)
content-security-policy
upgrade-insecure-requests
content-type
text/html; charset=utf-8
date
Fri, 22 May 2026 09:17:23 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

0

SPF
DKIM
DMARC

Domain Information

youlecn.com

Domain Age
23y 1m

Created

15.04.2003

Expires

15.04.2029

Last Updated

12.04.2024

Registrar

Chengdu West Dimension Digital Technology 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.
D
50/100
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, maximum-scale=1, user-scalable=yes
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

SF Pro SC

WCAG Partial
58/100
Readability
/30
21/30

16px · LH --

Hierarchy
/20
9/20
WCAG
/25
14/25

1:1 min contrast

Performance
/25
14/25

1 font

Heading Font

SF Pro SC

Body Font

SF Pro SC

Sans16px

Contrast Ratio

1:1

43 issues

Reading Comfort

Single Family

left aligned

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

⚠️ Partial contrast: 43 elements below WCAG AA threshold (min 1.0:1).

✅ 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

8 unique colors
5.52:1 AA Light
#dcdcde
Other· 15.2%
#56544f
Other· 5%
#f3f3f0
Primary· 42.5%
#c7c4b9
Secondary· 14.5%

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

10 Resources

7
Scripts
3
Styles
0
Async
0
Defer

Top Script Sources

themes(4)goutong.baidu.com(1)hm.baidu.com(1)s19.cnzz.com(1)

Website Identity

youlecn.com

youle@youlecn.com
23 years old
Location detected: 🇨🇳 Chinavia ip
Chengdu West Dimension Digital Technology Co., Ltd.

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Last analyzed: 22 May 2026 at 09:18

Historical Analysis & Change Tracking