To set up Qv2ray on Ubuntu for scientific browsing, follow these steps:

### Download the Qv2ray Client

To begin, download the Qv2ray client from the URL provided: https://pan.cslee.cc/s/Yp1CW. Once the download is complete, extract the contents of the file by running the command:

cp Qv2ray-*.AppImage ~/ && chmod +x ~/Qv2ray-*.AppImage
Then, run the Qv2ray client by executing the following command:
ev ~/Qv2ray-*.AppImage
### Configure the V2Ray Core

In the Qv2ray client, navigate to Preference > Kernel Settings. Here, you will need to configure the V2Ray core by specifying the path to the V2Ray executable and the assets directory. For this, select the following settings:

V2ray Core Executable Path: ~/v2ray-linux-64/v2ray
V2ray Assets Directory: ~/v2ray-linux-64

### Set Up System Proxy

Next, navigate to Preference > General Settings and select the following options:

Qv2ray Proxy: System Proxy

### Import Server Configurations

To use the Qv2ray proxy, you will need to import server configurations. To do this, navigate to the Import option within the Qv2ray client and import the provided configuration links. The recommended server to import is bwg-v2ray.

### Connect to the Server

Once you have imported the server configuration, select the server and click on the Connect button. The proxy will then be activated, and you can use it to browse securely.

### Using the Proxy in the Terminal

To use the Qv2ray proxy in the terminal, export the proxy settings by running the following commands:

export http_proxy=http://127.0.0.1:8889
export https_proxy=http://127.0.0.1:8889

With these steps, you should now be able to use the Qv2ray proxy on your Ubuntu system for scientific browsing.