jdair.net

https://jdair.net· First analyzed 24 May 2026· Updated 24 May 2026

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jdair.net

Mobile

Sponsored

Hosting Provider

Chinanet BJ

IP Address

1.202.236.190

Site Location

🇨🇳 Chinavia ip

Server Location

🇨🇳 Beijing, China

ASN

AS4847

Organization

Chinanet BJ

Server

Tengine

Nameservers

ns4.hnagroup.com.ns3.hnagroup.com.ns2.hnagroup.com.ns1.hnagroup.com.

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%

4.6 MB

71 requests

Image Optimization

Lazy LoadResponsiveVercel Image Optimization

0–49

50–89

90–100

Architecture Stack

Hybrid

⚙️ SSR

Frontend

Framework

Next.js

CMS

Ghost

Infrastructure

Hosting

Chinanet BJ

CDN

Vercel Image

Technology Stack

4 Technologies Detected

CSS Frameworks

Meta Frameworks

Web Servers

SEO Analysis

D48/100

Meta Tags14/15

Content6/12

Headings1/8

Technical9/21

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile1/4

Indexability3/3

jdair.netjdair.net

首都航空[官方网站]-机票查询_机票预订_航班查询_旅游度假_特价机票_三亚机票_丽江机票

北京首都航空官方网站，北京首都航空有限公司简称首都航空，是一家总部位于北京的公共运输航空公司。首都航空秉承“安全、简单、亲和”的服务理念，为旅客提供特色化的菜单式服务和舒适、方便、快捷的出行服务体验提供机票预订及航班动态查询服务。首都航空电话订票热线 95375。

Title Length45 chars

Recommended: 50-60 chars (~279px / 580px)

Description Length132 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag — every page should have exactly one H1

13 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

F26/100

Bot Access

20/25

Machine Read.

3/25

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

Text ratio:0%

Words:285

Token eff.:Too Short

Sections/1K:42.1

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...

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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.

73/100

Passed

Critical

Warnings

Images & Alt Text

18/20

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

Semantic Structure

8/20

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

11/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

6/15

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.

23/100

584 mg

CO₂e / view

4.6 MB

Page Weight

15%

Cleaner Than

New Visitor

668 mg

Returning (cached)

334 mg

Annual (10K/mo)

70.1 kg

Emission Segments

Data Center

131 mg

Network

140 mg

Device

314 mg

Resource Breakdown

JavaScript

2.4 MB

Images

710.2 KB

CSS

1.3 MB

HTML

15.3 KB

Other

209.2 KB

Green Hosting Not Verified

Chinanet BJ

7 recommendations

•Carbon footprint recommendation preview...

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Security Score

61%Fair

Interactive

HTTPS

No WAF

240d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

19.12.2025

Valid Until

20.01.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.jdair.netjdair.net

SHA-256 Fingerprint

70:91:29:9C:25:ED:74:20:26:CF:39:FF:8F:44:A4:80:F1:40:02:A5...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(private, no-cache, no-store, max-age=0, must-revalidate)

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-security-policy

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

content-type

text/html; charset=utf-8

date

Sun, 24 May 2026 08:38:27 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (2)

edge.hnair.com

edgebj.hnair.com

Domain Information

jdair.net

Domain Age

12y 4m

Created

08.01.2014

Expires

08.01.2029

Last Updated

14.08.2024

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.

69/100

Mobile Friendly26 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

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

Microsoft YaHei UI

WCAG Partial

55/100

Readability

/30

18/30

14px · LH 1.75

Hierarchy

/20

7/20

WCAG

/25

16/25

1:1 min contrast

Performance

/25

14/25

1 font

Heading Font

Microsoft YaHei UI

Sans

Body Font

Microsoft YaHei UI

Sans14px

Contrast Ratio

1:1

34 issues

Reading Comfort

~63 CPL

Optimal (45–75)

20px

14px

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

✅ Optimal line length: ~63 chars/line (ideal 45–75 CPL).

⚠️ Partial contrast: 34 elements below WCAG AA threshold (min 1.0:1).

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

✅ 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

3.41:1 AA Large Light

#8b8b8b

Other· 28.4%

#ffffff

Background· 26.799999999999997%

#015d8a

Primary· 10.6%

#1e6a8b

Accent· 10.1%

#6b3534

Secondary· 4.7%

#01345c

Accent· 4%

#115678

Accent· 2%

#3d7080

Secondary· 1.6%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

23 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(17)

Website Identity

jdair.net

12 years old

Location detected: 🇨🇳 Chinavia ip

Alibaba Cloud Computing (Beijing) Co., Ltd.

Sponsored

Last analyzed: 24 May 2026 at 08:39

Historical Analysis & Change Tracking