Using this 128x64 Graphic LCD is easy. First, connect it to your Arduino. Make sure to use the 5V power supply as specified. You can display Chinese characters, English characters, or graphics according to your project needs. To start, refer to the 'Setting Pixels for ST7920 based 128x64 LCD' document. For programming, use the provided Arduino libraries (serial or parallel mode). When handling the LCD, be gentle as it's a delicate device. Avoid touching the screen with dirty hands to prevent smudges. To maintain it, keep it in a dry and clean environment. If it's not in use for a long time, turn it off to save power and extend its lifespan.