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longcai.com

https://longcai.com· First analyzed 14 May 2026· Updated 14 May 2026
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longcai.com
Desktop screenshot of longcai.com
Mobile screenshot of longcai.com
Mobile

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Hosting Provider

Chinanet HL

IP Address

222.171.249.198

Site Location

🇨🇳 Chinavia ip

Server Location

🇨🇳 Harbin, China

ASN

AS4134

Organization

Chinanet HL

Server

Nginx

Nameservers

f1g1ns1.dnspod.net.f1g1ns2.dnspod.net.

Performance

74

Core Web Vitals

Weight

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

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Chinanet HL

Technology Stack

6 Technologies Detected

Libraries

2
jQueryv3.6.0
Animate.css

Frameworks

1
Vue.jsv3.2.37

UI Components

1
Swiper

CSS Frameworks

1
Tailwind CSS

Web Servers

1
Nginx

SEO Analysis

D46/100
12
10
1
Meta Tags5/15
Content8/12
Headings6/8
Technical9/21
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
L
longcai.comlongcai.com

龙采科技集团有限责任公司

龙采科技集团有限责任公司

Title Length12 chars

Recommended: 50-60 chars (~74px / 580px)

Description Length12 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (147/147) — critical for accessibility and SEO

11 issues found

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Local SEO

Local Search Readiness

10/100
Poor
3 12 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
Text ratio:4%
Words:292
Token eff.:Too Short
Sections/1K:41.1

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headingsavg 1.2w
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.
C
67/100
9
Passed
6
Critical
1
Warnings
Images & Alt Text
15/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
9/20
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
9/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
4 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.
13/100
F
365 mg
CO₂e / view
2.9 MB
Page Weight
30%
Cleaner Than
New Visitor
417 mg
vs
Returning (cached)
209 mg
Annual (10K/mo)
43.8 kg
Emission Segments
Data Center
82 mg
Network
88 mg
Device
196 mg
Resource Breakdown
JavaScript
266.6 KB
Images
2.1 MB
CSS
281.8 KB
HTML
8.0 KB
Other
253.2 KB
Green Hosting Not Verified
Chinanet HL
6 recommendations
  • •Carbon footprint recommendation preview...
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B

Security Score

76%Good
Static / Informational

HTTPS

No WAF

296d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Asseco Data Systems S.A.

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

05.02.2026

Valid Until

07.03.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.longcai.comlongcai.com

SHA-256 Fingerprint

3E:00:38:BB:EF:04:D6:4C:49:4C:55:A7:E6:E2:2F:E6:50:4B:92:7E...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-encoding
📦 Gzip(gzip)
content-type
text/html
date
Thu, 14 May 2026 20:23:47 GMT
etag
W/"67cfa307-9728"
last-modified
Tue, 11 Mar 2025 02:42:15 GMT
server
nginx
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

45

SPF
DKIM
DMARC

MX Records (2)

mxbiz2.qq.com
mxbiz1.qq.com

Domain Information

longcai.com

Domain Age
24y 3m

Created

30.01.2002

Expires

30.01.2027

Last Updated

12.07.2019

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.
D
43/100
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.
Viewport
width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

sans-serif

WCAG Partial
66/100
Readability
/30
20/30

16px · LH 2.25

Hierarchy
/20
15/20

5x ratio

WCAG
/25
16/25

1:1 min contrast

Performance
/25
15/25

0 fonts · 1 req

Heading Font

sans-serif

Sans80px

Body Font

sans-serif

Sans16px

Contrast Ratio

1:1

21 issues

Reading Comfort

~48 CPL

Optimal (45–75)
80px
h1
92px
h2
16px
p
Major Second
Scale

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

⚠️ Wide line spacing (2.25). 1.4–1.6 is optimal for body text.

✅ Optimal line length: ~48 chars/line (ideal 45–75 CPL).

⚠️ Partial contrast: 21 elements below WCAG AA threshold (min 1.0:1).

⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

✅ Strong hierarchy: Headlines are 5.0x larger than body text.

Color Palette

7 unique colors
Light
#ffffff
Background· 25.2%
#d0e3fe
Primary· 37.3%
#afd3fd
Accent· 15%
#92bcf1
Accent· 6.3%
#89a6cc
Secondary· 6.1%
#b3c4de
Secondary· 5.3%
#5e7aa2
Secondary· 4.7%

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Scripts & Styles

15 Resources

10
Scripts
5
Styles
0
Async
0
Defer

Top Script Sources

js(7)components(3)

Website Identity

longcai.com

400-622-8811
24 years old
Location detected: 🇨🇳 Chinavia ip
Alibaba Cloud Computing (Beijing) Co., Ltd.

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Last analyzed: 14 May 2026 at 20:24

Historical Analysis & Change Tracking