As for the time required for research and development and technical difficulties, Meng Chao believed that the former might not necessarily take hundreds of years, while the latter was also completely capable of overcoming them.
After all, the people of Dragon City were not in the great navigation era on Earth.
In the great navigation era, the technological level of the Earth's civilization developed linearly. Everything had to be done step by step and be self-reliant. From sailing battleships to steam and iron-armored ships to the use of electricity, radio, nuclear physics research, and manned space technology... everything was interconnected. Not a single step could be taken less than a few hundred years.