letpub.com.cn

https://letpub.com.cn· First analyzed 03 May 2026· Updated 03 May 2026

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letpub.com.cn

Mobile

Sponsored

Hosting Provider

Alibaba Cloud

alibabacloud.com

IP Address

121.43.157.168

Site Location

🇨🇳 Chinavia tld

Server Location

🇨🇳 Hangzhou, China

ASN

AS37963

Organization

Alibaba.com LLC

Server

Apache

Nameservers

dns10.hichina.com.dns9.hichina.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

2.6 s10%

Speed Index

3.4 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

3.7 MB

115 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Alibaba Cloud

Technology Stack

9 Technologies Detected

Libraries

Analytics

CSS Frameworks

Web Servers

Customer Support

SEO Analysis

D52/100

Meta Tags12/15

Content9/12

Headings6/8

Technical10/25

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile1/4

Indexability3/3

letpub.com.cnletpub.com.cn

LetPub编辑-SCI论文润色机构、修改 - 英文论文修改机构

LetPub SCI论文英语润色和同行资深专家修改团队全部由以英语为母语，有长期编辑科技论文经验的编辑组成。他们来自于临床医学、生物、化学、物理、工程学、天文学、地球与环境科学、人文社会学、商学等不同学科领域，且有丰富的SCI研究论文、领域综述的发表经验，经常获邀担任一些期刊的审稿人。

Title Length32 chars

Recommended: 50-60 chars (~196px / 580px)

Description Length144 chars

Recommended: 120-160 chars

Issues (2)

• Most images missing alt text (83/85) — critical for accessibility and SEO
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

13 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

258 URLs

robots.txt

5 rules

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

F36/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

0/25

Citation

5/25

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

blockquotes

Text ratio:6%

Words:445

Token eff.:Optimal

Sections/1K:15.7

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary10w

Descriptive Headingsavg 1.3w

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.

47/100

Passed

Critical

Warnings

Images & Alt Text

10/20

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

2/15

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

7/15

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

ARIA & Roles

4/15

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.

2/100

474 mg

CO₂e / view

3.7 MB

Page Weight

15%

Cleaner Than

New Visitor

541 mg

Returning (cached)

271 mg

Annual (10K/mo)

56.8 kg

Emission Segments

Data Center

106 mg

Network

114 mg

Device

254 mg

Resource Breakdown

JavaScript

416.7 KB

Images

2.0 MB

CSS

1.2 MB

HTML

92.6 KB

Other

361 B

Green Hosting Not Verified

Alibaba Cloud

8 recommendations

•Carbon footprint recommendation preview...

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Security Score

66%Fair

Interactive

HTTPS

No WAF

65d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-384 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

06.06.2025

Valid Until

07.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.letpub.com.cnletpub.com.cn

SHA-256 Fingerprint

B6:18:D1:99:68:83:11:2A:B5:5C:1B:76:16:56:E2:CB:56:9D:1F:9B...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate, post-check=0, pre-check...)

connection

Keep-Alive

content-security-policy

frame-ancestors 'self' *.peerkeke.com *.letpub.com.cn *.alip...

content-type

text/html; charset=utf-8

date

Sun, 03 May 2026 13:05:49 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

mxbiz1.qq.com

mxbiz2.qq.com

Domain Information

letpub.com.cn

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

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.

29/100

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.

4 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Helvetica Neue

WCAG Partial

58/100

Readability

/30

12/30

14px · LH --

Hierarchy

/20

13/20

2x ratio

WCAG

/25

14/25

2.02:1 min contrast

Performance

/25

19/25

System fonts

Heading Font

Helvetica Neue

Sans28px

Body Font

Helvetica Neue

Sans14px

Contrast Ratio

2.02:1

13 issues

Reading Comfort

~83 CPL

Wide lines

28px

14px

Minor Second

Scale

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

⚠️ Wide lines: ~83 chars/line. Use max-width: 65ch for comfortable reading.

⚠️ Hard to read: Flesch score 38/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 13 elements below WCAG AA threshold (min 2.0:1).

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

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

Flesch 38

Color Palette

9 unique colors

Light

#7f7f7f

Other· 53.99999999999999%

#e4e3d5

Secondary· 9.9%

#243346

Primary· 8.3%

#b09671

Secondary· 8.3%

#45584f

Secondary· 5.6%

#182435

Primary· 3.2%

#906040

Secondary· 3.2%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

18 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(5)ssl.google-analytics.com(2)google-analytics.com(1)Scripts(1)javascripts(1)

Website Identity

letpub.com.cn

Location detected: 🇨🇳 Chinavia tld

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Last analyzed: 03 May 2026 at 13:06

Historical Analysis & Change Tracking