Blue-and-white Lang scan code red packets: After purchasing Blue-and-white Lang wine, open the bottle cap, find a QR code in the bottle cap, scan the QR code with mobile phone WeChat or other app with code scanning function, and a red packet page will pop up on the mobile phone. Click "Open" to receive the red envelope. It is recommended to consult the official or relevant channels of Qinghua Lang to obtain the latest information on red envelope activities.