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co188.com

https://co188.com· First analyzed 01 May 2026· Updated 01 May 2026
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co188.com
Desktop screenshot of co188.com
Mobile screenshot of co188.com
Mobile

Sponsored

Hosting Provider

ChangZhou Bitcomm Software Technology Co., Limited

IP Address

118.184.169.35

Site Location

🇨🇳 Chinavia ip

Server Location

🇨🇳 Changzhou, China

ASN

AS18257

Organization

ChangZhou Bitcomm Software Technology Co., Limited

Server

Nginx

Nameservers

ns2.pubyun.com.ns1.pubyun.com.

Performance

73

Core Web Vitals

Weight

First Contentful Paint
6.8 s10%
Speed Index
8.9 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
76 KB
97 requests

Image Optimization

Lazy Load
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
ChangZhou Bitcomm Software Technology Co., Limited

Technology Stack

1 Technologies Detected

Web Servers

1
Nginx

SEO Analysis

D46/100
12
10
3
Meta Tags4/15
Content11/12
Headings3/8
Technical8/25
E-E-A-T0/7
Images3/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
C
co188.comco188.com

土木在线网_土木工程网站_土木工程师职业成长家园！

No description available for this page.

Title Length25 chars

Recommended: 50-60 chars (~155px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

  • • Missing meta description — important for click-through rates in SERPs
  • • Missing H1 tag — every page should have exactly one H1
  • • Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

13 issues found

Upgrade to view details

Crawlability

Sitemap
robots.txt

6 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

F31/100
Bot Access
20/25
Machine Read.
8/25
Schema Data
0/25
Citation
3/25

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:9%
Words:792
Token eff.:Optimal
Sections/1K:1.3
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headingsavg 1w
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...
Upgrade to view recommendations

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.
D
50/100
5
Passed
7
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
4/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
5/15
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
5/15
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.
4 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.
51/100
A+
9 mg
CO₂e / view
76.0 KB
Page Weight
95%
Cleaner Than
New Visitor
11 mg
vs
Returning (cached)
5 mg
Annual (10K/mo)
1.1 kg
Emission Segments
Data Center
2 mg
Network
2 mg
Device
5 mg
Resource Breakdown
Images
61.9 KB
HTML
14.1 KB
Green Hosting Not Verified
ChangZhou Bitcomm Software Technology Co., Limited
4 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

62d

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

12.07.2025

Valid Until

02.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.co188.comco188.com

SHA-256 Fingerprint

94:5C:00:39:B0:EB:D3:3C:D1:73:57:76:1C:FE:6F:E6:DE:05:19:CE...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

connection
keep-alive
content-encoding
📦 Gzip(gzip)
content-type
text/html
date
Fri, 01 May 2026 11:59:04 GMT
etag
W/"69f49459-f666"
last-modified
Fri, 01 May 2026 11:54:01 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

45

SPF
DKIM
DMARC

MX Records (1)

mx.ym.163.com

Domain Information

co188.com

Domain Age
18y 4m

Created

12.12.2007

Expires

12.12.2027

Last Updated

04.07.2024

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.
F
37/100
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...
Upgrade to view recommendations

Typography & Readability

Microsoft YaHei + ΢���ź�

WCAG Partial
45/100
Readability
/30
12/30

12px · LH 1.50

Hierarchy
/20
5/20
WCAG
/25
14/25

2.21:1 min contrast

Performance
/25
14/25

2 fonts

Heading Font

Microsoft YaHei

Sans

Body Font

΢���ź�

Sans12px

Contrast Ratio

2.21:1

3 issues

Reading Comfort

~156 CPL

Too wide
22px
h2
12px
p

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

❌ Very long lines: ~156 chars/line causes eye strain. Add max-width constraint.

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

⚠️ Partial contrast: 3 elements below WCAG AA threshold (min 2.2:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

Buy on MyFontsFlesch 100

Color Palette

9 unique colors
Light
#7f7f7f
Other· 37.7%
#fefeff
Primary· 19.1%
#191c22
Secondary· 10.4%
#554650
Text· 9.1%
#174d62
Accent· 7.2%
#060509
Secondary· 4.3%
#c5434c
Accent· 3.9%
#ab9e91
Secondary· 2%

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

26 Resources

20
Scripts
6
Styles
3
Async
0
Defer

Top Script Sources

g.co188.com(14)passport.co188.com(3)hm.baidu.com(1)dup.baidustatic.com(1)pos.baidu.com(1)

Website Identity

co188.com

18 years old
Location detected: 🇨🇳 Chinavia ip
Alibaba Cloud Computing (Beijing) Co., Ltd.

Sponsored

Last analyzed: 01 May 2026 at 11:59

Historical Analysis & Change Tracking