tantech.cn

Tasks

Select one version of your site as main and make a redirect from other versions to that one.
Avoid using deprecated HTML tags.
Implement the viewport meta tag.
Use "H" tags.

SEO

URL

Domain : www.tantech.cn/

Character length : 15

Title

碳博士控股-点亮城市智慧能源

Description

碳博士控股，美国纳斯达克上市企业，是一家集研发、生产、销售为一体的新材料、新能源的企业。主要生产新能源汽车以及超级电容炭、竹醋、有机肥、烧烤炭、清洁剂等竹炭衍生品。

Keywords (meta keywords)

碳博士，碳博士控股，浙江富来森，富来森，竹炭，新能源汽车，竹醋，有机肥，超级电容碳，纳斯达克，纳斯达克指数，中概股，中国概念股

Error! Using “meta keywords” is meaningless in a while.

Open Graph Protocol

Error! The website does not use the OG (Open Graph) protocol.

Dublin Core

Dublin Core is not used

Underscores in the URLs

Good! No underscore (_) found in the URLs.

Search engine friendly URLs

Good! The website uses SEO friendly URLs.

Checking the robots.txt file

The robots.txt file is missing!

Social

Social Engagement

No info found.

Content

Doctype

XHTML 1.0 Transitional

Encoding

Perfect! The character encoding is set: GB2312.

Language

Error! No language localization is found.

Title

碳博士控股-点亮城市智慧能源

Character length : 14

Good! The title’s length is between 10 and 70 characters.

Text / HTML ratio

Ratio : 31%

Good! The text / code ratio is between 25 and 70 percent.

Headings

H1	H2	H3	H4	H5	H6
0	0	0	0	0	0

No "H" tags found

Heading structure in the source code

Word cloud

ðâîåöððä2

Keyword matrix

word	title	descriptions	heading
ðâîåöððä

404 Page

The website has a 404 error page.

Flash content

Good! The website does not have any flash contents.

Frame

Good! The website does not use iFrame solutions.

Images

We found 10 images on this web page.

Alternate attributes for the following 9 images are missing. Search engines use "alt" tags to understand image content efficiently. We strongly recommend fixing this issue.

Technologies

Deprecated HTML elements

Good! No deprecated HTML tags are detected.

Redirection (www / not www)

Error! The web address is accessible with and without www!

Deprecated HTML elements

Good! No deprecated HTML tags are detected.

Printability

Suggestion! Unfortunately, no printer-friendly CSS found.

Meta Tag (viewport tag, mobile devices)

Error! The meta tag named viewport is missing.

Speed test

Server response time

The server response time is fast enough.

Table layout

Good! No nested tables found.

Number of HTTP resources

Number of source domains

Render blocking resources

The elements below are blocking the “above the fold” rendering.
List of render blocking javascript files

http://www.tantech.cn/js/ark.js

List of render blocking css files

http://www.tantech.cn/css/style.css
http://www.tantech.cn/css/index.css

Speed test – Javascript

Javascript

Good! Just a few javascript files are detected on the website.

http://www.tantech.cn/js/ark.js

File size of all javascript files combined

8.48KB

Javascript minifying

You can save 428B (20% compression) on the analysed URL by minifying the javascript files.

Speed test – CSS

CSS

Good! Just a few CSS files are used on this website.

http://www.tantech.cn/css/style.css
http://www.tantech.cn/css/index.css

File size of all css files combined

12.09KB

CSS minifying

Great! The CSS elements are minified.

Speed test – Compression

Uncompressed size of the of the HTML

10.59KB

Gzip compression

Your site uses compression.

Speed test – Browser cache

Number of static resources (image, JS, CSS)

Browser cache

The browser cache is not set correctly for all elements.

URL	Duration
http://www.tantech.cn/css/index.css	Expiry time is not specified
http://www.tantech.cn/css/style.css	Expiry time is not specified
http://www.tantech.cn/image/4.jpg	Expiry time is not specified
http://www.tantech.cn/image/5.jpg	Expiry time is not specified
http://www.tantech.cn/image/LOGO.jpg	Expiry time is not specified
http://www.tantech.cn/image/banner_lbbg.jpg	Expiry time is not specified
http://www.tantech.cn/image/banner_ltbg.jpg	Expiry time is not specified
http://www.tantech.cn/image/banner_rbbg.jpg	Expiry time is not specified
http://www.tantech.cn/image/banner_rtbg.jpg	Expiry time is not specified
http://www.tantech.cn/image/damen.jpg	Expiry time is not specified
http://www.tantech.cn/image/main_new_tb.jpg	Expiry time is not specified
http://www.tantech.cn/image/nav_bg.jpg	Expiry time is not specified
http://www.tantech.cn/image/nav_pro_bg.jpg	Expiry time is not specified
http://www.tantech.cn/image/nav_sub.jpg	Expiry time is not specified
http://www.tantech.cn/image/news_labg.jpg	Expiry time is not specified
http://www.tantech.cn/image/news_t_bg.jpg	Expiry time is not specified
http://www.tantech.cn/image/page_bg.jpg	Expiry time is not specified
http://www.tantech.cn/image/product_title_lbg.jpg	Expiry time is not specified
http://www.tantech.cn/image/product_title_rbg.jpg	Expiry time is not specified
http://www.tantech.cn/image/telephone.jpg	Expiry time is not specified
http://www.tantech.cn/image/top_new_bg.jpg	Expiry time is not specified
http://www.tantech.cn/image/top_new_laba.jpg	Expiry time is not specified
http://www.tantech.cn/image/top_new_lbg.jpg	Expiry time is not specified
http://www.tantech.cn/image/top_new_rbg.jpg	Expiry time is not specified
http://www.tantech.cn/image/video_Bbg.jpg	Expiry time is not specified
http://www.tantech.cn/image/video_bg.jpg	Expiry time is not specified
http://www.tantech.cn/images/banner-1.jpg	Expiry time is not specified
http://www.tantech.cn/js/ark.js	Expiry time is not specified

Speed test – Images

File size of all images combined

385.85KB

Image optimisation

You can save 192.1KB (51% compression) by optimising the images below:

By lossless compressing the http://www.tantech.cn/images/banner-1.jpg you can save 74.3KB (50%) data.
By lossless compressing the http://www.tantech.cn/image/4.jpg you can save 31.8KB (45%) data.
By lossless compressing the http://www.tantech.cn/image/5.jpg you can save 24.4KB (46%) data.
By lossless compressing the http://www.tantech.cn/image/LOGO.jpg you can save 22.2KB (71%) data.
By lossless compressing the http://www.tantech.cn/image/damen.jpg you can save 20.7KB (47%) data.
By lossless compressing the http://www.tantech.cn/image/video_Bbg.jpg you can save 8.6KB (65%) data.
By lossless compressing the http://www.tantech.cn/image/telephone.jpg you can save 4.6KB (69%) data.
By lossless compressing the http://www.tantech.cn/image/news_labg.jpg you can save 3.2KB (66%) data.
By lossless compressing the http://www.tantech.cn/image/nav_pro_bg.jpg you can save 823B (53%) data.
By lossless compressing the http://www.tantech.cn/image/main_new_tb.jpg you can save 445B (50%) data.
By lossless compressing the http://www.tantech.cn/image/video_bg.jpg you can save 354B (45%) data.
By lossless compressing the http://www.tantech.cn/image/nav_bg.jpg you can save 185B (30%) data.
By lossless compressing the http://www.tantech.cn/image/banner_rbbg.jpg you can save 120B (22%) data.
By lossless compressing the http://www.tantech.cn/image/banner_rtbg.jpg you can save 115B (22%) data.
By lossless compressing the http://www.tantech.cn/image/product_title_rbg.jpg you can save 106B (21%) data.
By lossless compressing the http://www.tantech.cn/image/banner_ltbg.jpg you can save 101B (20%) data.

Links

We found a total of 36 different links.
Internal links: 33
External links: 3

External links:

Link text (anchor)	Link strength
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Internal links:

Link text (anchor)	Link strength
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English
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http://www.tantech.cn/product.html
http://www.tantech.cn/product-stuff.html
http://www.tantech.cn/product-chemical.html
http://www.tantech.cn/product-vinegar.html
http://www.tantech.cn/product-barbecue.html
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Website security

42.159.29.86

External hidden links

Good! No hidden external links found

Looking for eval()

Good! No eval(bas64_decode()) scripts are found

Checking for XSS vulnerability

No XSS vulnerability found

Email encryption

Good! We have not found any unencrypted email addresses.

Sites on same ip

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Icons

Favicon

Error! No favicon is found. Using favicon helps to build a better brand quicker.

Typos

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SEO report of tantech.cn