jlbtc.edu.cn

https://jlbtc.edu.cn· First analyzed 29 May 2026· Updated 29 May 2026

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jlbtc.edu.cn

Mobile

Sponsored

Hosting Provider

SYR Cernet

IP Address

125.223.225.178

Site Location

🇨🇳 Chinavia tld

Server Location

🇨🇳 Shenyang, China

ASN

AS4538

Organization

SYR Cernet

Server

none

Nameservers

dns1.jlbtc.edu.cn.

Performance

Core Web Vitals

Weight

First Contentful Paint

2.2 s10%

Speed Index

2.8 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

23 MB

73 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

SYR Cernet

Technology Stack

4 Technologies Detected

CSS Frameworks

Libraries

UI Components

SEO Analysis

D41/100

Meta Tags4/15

Content8/12

Headings0/8

Technical11/21

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

jlbtc.edu.cnjlbtc.edu.cn

吉林工商学院

No description available for this page.

Title Length6 chars

Recommended: 50-60 chars (~37px / 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
• Most images missing alt text (32/45) — critical for accessibility and SEO

10 issues found

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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

F25/100

Bot Access

20/25

Machine Read.

2/25

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

nav

Text ratio:4%

Words:134

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...

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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.

56/100

Passed

Critical

Warnings

Images & Alt Text

5/20

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

8/15

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

5 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.

17/100

2.91 g

CO₂e / view

23.0 MB

Page Weight

Cleaner Than

New Visitor

3.33 g

Returning (cached)

1.66 g

Annual (10K/mo)

349.4 kg

Emission Segments

Data Center

650 mg

Network

699 mg

Device

1.56 g

Resource Breakdown

JavaScript

145.5 KB

Images

14.6 MB

CSS

8.0 MB

HTML

10.8 KB

Other

232.0 KB

Green Hosting Not Verified

SYR Cernet

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

41%Poor

Interactive

HTTPS

No WAF

122d

Certificate Details

Type

Organization Validated (OV)

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

05.09.2025

Valid Until

28.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.jlbtc.edu.cnjlbtc.edu.cn

SHA-256 Fingerprint

CF:D9:E1:4C:D3:36:3D:A0:28:B5:15:63:45:F7:1D:2C:70:AC:96:47...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟡 600s(private, max-age=600)

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-language

zh-CN

content-type

text/html

date

Fri, 29 May 2026 06:47:30 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

hzmx01.mxmail.netease.com

hzmx02.mxmail.netease.com

Domain Information

jlbtc.edu.cn

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.

54/100

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=1.0,maximum-scale=1.0,user-scalable=0

4 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

arial

WCAG Partial

68/100

Readability

/30

22/30

19px · LH 1.50

Hierarchy

/20

8/20

WCAG

/25

17/25

1:1 min contrast

Performance

/25

21/25

System fonts

Heading Font

arial

Body Font

arial

Sans19px

Contrast Ratio

1:1

17 issues

Reading Comfort

Single Family

left aligned

24px

19px

✅ Excellent readability: 19px body text is ideal for all devices.

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

⚠️ Partial contrast: 17 elements below WCAG AA threshold (min 1.0:1).

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

✅ Modern fluid typography: clamp() with rem units ensures zoom accessibility (WCAG 1.4.4).

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

Fluid Type (rem)

Color Palette

10 unique colors

Dark

#4b483e

Secondary· 12.6%

#7f1293

Primary· 26.200000000000006%

#350c3d

Accent· 11.6%

#8e7c9e

Secondary· 10.1%

#5a0b68

Accent· 7.5%

#7b37a0

Secondary· 7%

#faf8fa

Secondary· 6.8%

#7f5a95

Secondary· 6.3%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

20 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(7)assets(6)_sitegray(1)

Website Identity

jlbtc.edu.cn

Location detected: 🇨🇳 Chinavia tld

zh-cn

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Last analyzed: 29 May 2026 at 06:48

Historical Analysis & Change Tracking