bjtu.edu.cn

https://bjtu.edu.cn· First analyzed 27 Apr 2026· Updated 27 Apr 2026

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bjtu.edu.cn

Mobile

Sponsored

Hosting Provider

NJTU

IP Address

59.64.6.17

Site Location

🇨🇳 Chinavia tld

Server Location

🇨🇳 Haidian, China

ASN

AS4538

Server

Nginx

Nameservers

jupiter.bjtu.edu.cn.mars.bjtu.edu.cn.venus.bjtu.edu.cn.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.8 s10%

Speed Index

2.3 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

15.2 MB

46 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

NJTU

Technology Stack

4 Technologies Detected

Libraries

CSS Frameworks

Web Servers

Customer Support

SEO Analysis

D44/100

Meta Tags4/15

Content10/12

Headings3/8

Technical9/21

E-E-A-T3/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile1/4

Indexability3/3

bjtu.edu.cnbjtu.edu.cn

北京交通大学

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 (28/28) — critical for accessibility and SEO

14 issues found

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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

F26/100

Bot Access

20/25

Machine Read.

5/25

Schema Data

0/25

Citation

1/25

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. listsnavheader/footer

Text ratio:5%

Words:284

Token eff.:Too Short

Sections/1K:91.5

Depth:3/5

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headingsavg 1.1w

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...

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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.

65/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

10/20

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.

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

1.93 g

CO₂e / view

15.2 MB

Page Weight

Cleaner Than

New Visitor

2.20 g

Returning (cached)

1.10 g

Annual (10K/mo)

231.5 kg

Emission Segments

Data Center

431 mg

Network

463 mg

Device

1.04 g

Resource Breakdown

JavaScript

123.5 KB

Images

14.9 MB

CSS

145.3 KB

HTML

48.6 KB

Green Hosting Not Verified

NJTU

7 recommendations

•Carbon footprint recommendation preview...

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Security Score

61%Fair

Interactive

HTTPS

No WAF

208d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

24.11.2025

Valid Until

21.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.bjtu.edu.cnbjtu.edu.cn

SHA-256 Fingerprint

34:CE:53:69:97:E0:DA:26:36:5F:6C:78:6A:24:A4:07:83:C8:C5:F6...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

connection

keep-alive

content-length

49477

content-security-policy

script-src * 'unsafe-inline' 'unsafe-eval'

content-type

text/html

date

Mon, 27 Apr 2026 22:29:33 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

smg.bjtu.edu.cn

Domain Information

bjtu.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.

53/100

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,minimum-scale=1.0, maximum-scale=1.0

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Microsoft YaHei

WCAG Partial

55/100

Readability

/30

18/30

14px · LH 1.57

Hierarchy

/20

7/20

WCAG

/25

14/25

2.85:1 min contrast

Performance

/25

16/25

2 fonts

Heading Font

Microsoft YaHei

Sans

Body Font

Microsoft YaHei

Sans14px

Contrast Ratio

2.85:1

4 issues

Reading Comfort

~43 CPL

Narrow lines

24px

16px

14px

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.57 ratio (ideal range 1.4–1.6).

⚠️ Partial contrast: 4 elements below WCAG AA threshold (min 2.9:1).

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

✅ Lean font stack: 2 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFonts

Color Palette

12 unique colors

4.63:1 AA Light

#ffffff

Background· 31.2%

#7e7272

Other· 2%

#b10001

Accent· 13.5%

#005bac

Primary· 11.5%

#f1370b

Accent· 8%

#cb0302

Accent· 7.7%

#e91905

Accent· 6.1%

#414c76

Secondary· 5.5%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

10 Resources

Scripts

Styles

Async

Defer

Top Script Sources

js(3)local(2)g_style(2)

Website Identity

bjtu.edu.cn

Location detected: 🇨🇳 Chinavia tld

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Last analyzed: 27 Apr 2026 at 22:30

Historical Analysis & Change Tracking