Online booking, December is not the peak season, but Barcelona really has no off-season, 4 p.m. in the past, no one queued at the door, there are still a lot of people inside, but wait a little, or can wait until no one take a picture. Here is a Chinese explainer, you can listen carefully. The explainer is a mobile phone, and you can see some images on it. It is suggested that you take a good look. If you don't take a photo of Barcelona more than 5 o'clock, the sun will go down. It is specially designed to wait for the sun to go down on the roof of the building. It can be arranged on the top of the beautiful pictures under the sunset. There will be staff inviting you to a small balcony and many projects in China. Well, take a picture and ask if you want to buy it or not. You can choose it. If it's good, it's worth remembering.