I got a LCD board is quiet difference, it has I2C interface installed and the pin function is different from the other lcd. I have attached the interface pin function below. cuz it has sda and scl pin, so I connect it to arduino pin4 and pin5. I do not know how to deal with the SA0 ,SA1 and CSB connection, also the code, I am going to follow the LCD_i2c library. But I am not sure the connection.
I have also attached the lcd data sheet.
