Site Info - 520pub.com

phpwind is a Chinese open source system for community sites based on PHP.

PHP is a scripting language for creating websites.

JavaScript is a lightweight, object-oriented, cross-platform scripting language, often used within web pages.

Nginx (pronounced as "engine X") is a lightweight open source web server developed by Igor Sysoev.

Oracle provides a large range of IT products and services.

Oracle provides a large range of IT products and services.

Tencent is a Chinese IT and telecommunication services provider. This includes its QQ and other brands.

Let’s Encrypt is a free, automated, and open certificate authority provided by the Internet Security Research Group.

GlobalSign is an IT security service provider, also operating as SSL certificate authority.

An SSL certificate authority that is not recognized by major browsers, resulting in an error message when loading a page.

Baidu Analytics (Tongji) is a web analytics service by Baidu.

External Cascading Style Sheets define style rules in a separate CSS file.

Embedded Cascading Style Sheets define a set of style rules in a <style> element within a web page.

Inline Cascading Style Sheets define style rules directly within an (X)HTML element using the style attribute.

Persistent cookies with an expiration time between 1 month and 1 year.

Non-HttpOnly cookies are used in the HTTP protocol and also in client side scripts, which may be a security threat.

Secure cookies are used only via an encrypted connections, which may increase security.

Non-secure cookies may be used via an unencrypted connections, which may be a security threat.

Gzip (GNU zip) is a file compression algorithm.

QUIC (Quick UDP Internet Connections) is an experimental network protocol, originally designed by Google and submitted to IETF standardization.

HTTP Strict Transport Security (HSTS) defines a mechanism enabling web sites to declare themselves accessible only via secure connections.

The websites redirects visitors to use SSL encryption, e.g. from http://example.com/ to https://example.com/.

HTML5 is the fifth revision of the HTML standard.

UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode, which is backwards compatible with ASCII.

GIF (Graphics Interchange Format) is a lossless compression image format, originally introduced by CompuServe and suitable to store graphics, logos and simple animations.

PNG (Portable Network Graphics) is a lossless compression image format, suitable to store graphics with uniformly colored areas, and originally introduced as a free, open-source successor of GIF.

Commercial entities