It was a well-known fact that the primary reason why a spaceship was not called a flying machine was due to Huaxia's culture and tradition of naming objects descriptively and literally.
Large ships traverse the seas; spaceships traverse the galaxy. However, in terms of controls and operations, the two actually shared certain similarities.
There were many people on a naval vessel, and each crew member or team would be placed in charge of only one operational module, and would work collectively as part of a larger system to ensure the operational functionality of the vessel. Spaceships also functioned in a similar manner, at least according to the scenarios written in various science fiction works, and hence were also naturally considered a type of ship.
However, Su Mo still thought it was mind-blowing for an ordinary shipyard to be able to actually build these things!