wch.cn

https://wch.cn· First analyzed 05 May 2026· Updated 05 May 2026

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wch.cn

Mobile

Sponsored

Hosting Provider

Chinanet JS

IP Address

58.213.45.186

Site Location

🇨🇳 Chinavia tld

Server Location

🇨🇳 Nanjing, China

ASN

AS4134

Organization

Chinanet JS

Server

Nginx

Nameservers

dns1.hichina.com.dns2.hichina.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

5.8 s10%

Speed Index

7.6 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

7.3 MB

56 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Chinanet JS

Technology Stack

4 Technologies Detected

Analytics

CSS Frameworks

Web Servers

SEO Analysis

F36/100

Meta Tags7/15

Content3/12

Headings0/8

Technical11/25

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile1/4

Indexability3/3

wch.cnwch.cn

首页 - 南京沁恒微电子股份有限公司

沁恒是一家基于自研专业接口IP、微处理器内核IP构建一体化芯片的集成电路设计企业。主要产品包括USB/蓝牙/以太网接口芯片和连接型/互联型/无线型MCU，产品侧重于连接、联网和控制。

Title Length18 chars

Recommended: 50-60 chars (~111px / 580px)

Description Length91 chars

Recommended: 120-160 chars

Issues (3)

• Very thin content (3 words). Search engines need substantial content for ranking.
• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (16/16) — critical for accessibility and SEO

13 issues found

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Crawlability

Sitemap

Type: standard

robots.txt

5 rules

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

F28/100

Bot Access

20/25

Machine Read.

6/25

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.txtinvalid

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:1%

Words:252

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.

61/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

3/20

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

7/15

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.

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.

20/100

921 mg

CO₂e / view

7.3 MB

Page Weight

Cleaner Than

New Visitor

1.05 g

Returning (cached)

526 mg

Annual (10K/mo)

110.5 kg

Emission Segments

Data Center

206 mg

Network

221 mg

Device

494 mg

Resource Breakdown

JavaScript

7.1 MB

Images

180.7 KB

CSS

9.4 KB

HTML

2.1 KB

Green Hosting Not Verified

Chinanet JS

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

36%Critical

Interactive

HTTPS

No WAF

257d

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/2

Valid From

17.12.2025

Valid Until

17.01.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.wch.cnwch.cn

SHA-256 Fingerprint

FE:C1:F6:9C:88:F7:C0:52:21:CF:30:19:92:E3:8E:BD:7C:E1:94:1B...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-type

text/html

date

Tue, 05 May 2026 09:24:30 GMT

etag

W/"69b79270-12b4"

last-modified

Mon, 16 Mar 2026 05:17:36 GMT

server

nginx

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (2)

mxbiz2.qq.com

mxbiz1.qq.com

Domain Information

wch.cn

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

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.

68/100

Mobile Friendly21 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=1.0

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Microsoft YaHei

WCAG Partial

62/100

Readability

/30

21/30

16px · LH --

Hierarchy

/20

9/20

WCAG

/25

19/25

3.29:1 min contrast

Performance

/25

13/25

1 font · 2 req

Heading Font

Microsoft YaHei

Body Font

Microsoft YaHei

Sans16px

Contrast Ratio

3.29:1

1 issue

Reading Comfort

Single Family

left aligned

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

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 3.3:1).

✅ 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

10 unique colors

Light

#f6f7fb

Background· 26.499999999999996%

#274890

Accent· 17.1%

#3b5ca0

Secondary· 10.4%

#1c366b

Primary· 8.8%

#556ca8

Secondary· 8%

#789fc6

Secondary· 7.6%

#628dc1

Secondary· 6.6%

#ced2d9

Text· 5.5%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

3 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cdn.wch.cn(2)hm.baidu.com(1)

Website Identity

wch.cn

Location detected: 🇨🇳 Chinavia tld

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Last analyzed: 05 May 2026 at 09:25

Historical Analysis & Change Tracking