3w.cn (三维推) is positioned as a promotion tool for images, files and audio. Images, files and audio processed through 三维推 can help users implement online storage, and the generated short links and QR codes are intended to support marketing and promotion.

## What it supports

- **Image promotion**: after uploading an image, users can directly generate a short URL and QR code. The image can be changed at any time as needed while the link remains unchanged, and scanning the code displays it directly. It can be used for physical products, company brochures, event notices, program lists and other online promotion scenarios.

- **File promotion**: no Office is required; files can be viewed online and downloaded conveniently. Learning materials can be downloaded by scanning a code, and file reports can be stored online for backup and long-term use. After generating a short URL and QR code, the file can also be modified.

- **Audio promotion**: supports multiple audio file formats. It can be used for scenic-area audio guides or teaching materials such as English listening content, delivered through a short link or QR code.

## Basic workflow

1. Upload a file, image or audio.

2. Set the name and password.

3. Generate a short link and QR code.

The site also lists entries for short links, API interfaces, data statistics demos, QR code generation/parsing, QR code business cards, video promotion, Taobao promotion tools and graphic-text promotion.

The official site does not provide a self-hosted version, deployment documentation or server resource requirements, and the pricing page currently returns a 404 page. It is therefore more suitable to treat 三维推 as an online service. Users in China may also want to note the WeChat scan demos, the option to guide users to open Mobile Taobao outside WeChat, the ICP filing information and WeChat customer-service support.