The train that Lucy's family was riding was one of the fastest and newest space trains available. It continued 100 kilometers through the space city to reach the spaceport in just over 20 seconds.

The spaceport is located 100 kilometers directly above the space city, and the base at the bottom is also in the shape of a disk, with an area of 100,000 square kilometers. The terminal of the space train is located in the middle of the spaceport, and it is also used as a station for passengers to travel to other planets or space cities.

From a distance, the station looks like a large octagonal blue diamond. At the center of the "Diamond" is the central platform. Starting from the center of the central platform, the eight areas divided into eight lines connected to the vertices of the eight corners of the "diamond" are the eight platforms. Each side of the octagonal "diamond" extends along its vertical path with dozens of boarding lanes. There are several boarding gates for each boarding aisle, and ships of different sizes are moored on both sides of each boarding aisle.

Platforms 1-6 of the eight stations in the spaceport are used for interstellar transportation, platform 7 is used for transportation to and from Space City, and platform 8 is dedicated to the military and serves as the station of the Earth Federation Space Force Starfleet. This platform is a military exclusion zone, isolated from the rest of the spaceport.

When the space train arrived at the terminal station, the central platform of the spaceport, the sound of the announcement in the carriage sounded again: "The train has arrived at the station, please bring your belongings and get off the train in an orderly manner." ”

Seeing that the train has arrived, Lucy and her parents prepare to get off the train. She patted Leia on the shoulder again: "Let's get out of the car together." ”

"Yes." Leia and Lucy left the carriage together and went to the platform outside. There happened to be a small traffic boat parked nearby, so the two families took the small boat to the waiting hall together. Since the children have become friends, the two families have a good conversation and the atmosphere is harmonious.

The airship shuttled through the platform for several minutes until it landed at a dedicated berth in the hall.

The time has come for Lucy and Leia to separate. Lucy and Leia hugged tightly, unable to bear to be separated. The two families also said goodbye to each other. At this time, a flight message was broadcast in the lobby: "Passengers going to the Martian Federation are requested to board the ship at 3 p.m. standard time in the 12th region of the earth, at platform 2, boarding aisle 5, boarding gate 3." ”

Leia's father, Potter, looked at the flight information displayed by the light curtain above the hall, and there were still 10 minutes before the boarding time. Seeing that it was not too early, he and his family waved goodbye to Lucy's family and boarded another small airship headed for the boarding port.

The time used in the space city and the spaceport is the time zone where the ground rail transit center is located, that is, the time in the east and west regions of the earth. Since the central circle of the space city and the spaceport are connected by a closed cylindrical space train track. Therefore, these two are connected with the three points of the air-ground integrated rail transit center located on the ground, and both are stationary relative to the ground, so the time and date of both are consistent with the rail transit center on the ground.

Looking at the departing figure of Leia's family, Owen said to his wife Kate: "Let's hurry up and go to Platform 8, don't let my father wait in a hurry." ”

Lucy also hurriedly said: "Yes, grandpa is about to leave, and I haven't seen him for a long time." I want to see my grandfather soon and spend a little more time with him. ”