Central Railway Station is an ever-glorious gray building. Look at the picture of two towers with a similar object. The one on the right side of the picture is indeed a clock. The one on the left really made me laugh, and I found that the pointer slid at a very large angle once, similar to the distance of 5 minutes. Then I told my friend that the clock was so strong that it only took 5 minutes to walk once and 5 minutes at a time. Then they say you brag. Then we watched together and found God. Sometimes he was walking, sometimes he was walking backwards. Looking carefully, he had only one needle. How to time it? Do you guess what it is? After checking the data, we can see that this is a wind vane. How strong is the wind in your Netherlands? We need a wind vane at the railway station.