hi..i will be arriving at guangzhou baiyun international airport at 2am.

There is no bus running at 02:00am. You are advised to take a taxi, the fee is about CNY 90 -100. Don't worry. You can take the photo of the license plate number and send it on your social media. And take the bill before you get off. In addition, you are suggested to negotiate the price before getting on the car.