Why did the train stop in Fuyang for so long? I went to Shenyang today and looked at the timetable. It was found that the train stopped in Shenyang for 17 minutes, but stopped in Fuyang for 20 minutes

Why did the train stop in Fuyang for so long? I went to Shenyang today and looked at the timetable. It was found that the train stopped in Shenyang for 17 minutes, but stopped in Fuyang for 20 minutes. Fuyang is one of the six major road network hubs in China. It is also an interval station of several domestic railway bureaus, and Fuyang Station is also the gateway of Shanghai Railway Bureau. Such as the train from Nanchang to Beijing. Nanchang Railway Bureau is responsible for the operation from Nanchang to Fuyang, and Beijing Railway Bureau is responsible for the operation to Fuyang. Moreover, Fuyang, as one of the largest railway hubs in the city, is both a handover station and a supply station. You will find that when the car arrives in Fuyang, the garbage on it will be transported down. The water used in the car is also supplied by Fuyang Station. It will take some time to change the nose and make up the train. Fuyang station will also be responsible for train maintenance. These have little to do with the passenger flow in Fuyang. It's just that Fuyang has a special position on the China Railway.