For example, the copper and iron metals used in the forging of bows, crossbows, and weapons by the Mechanical Technology Department, as well as the saltpeter and charcoal used by the Thunder and Fire Department.
It's fair to say that the reason the Mechanical Technology and Thunder and Fire Departments can so recklessly delve into mechanics and gunpowder is largely due to the reliance on their senior brothers from the Celestial Craft Department, who are skilled in construction.
As someone who has dealt with civil engineering and iron and steel for a lifetime, when Huang Liang saw this incredibly massive Black Ship, his first reaction was how could this thing have been built?
Despite being deep inland, Huang Liang had some research on shipbuilding and knew that such a steel behemoth, if designed properly, could indeed sail on the sea.
The key is how complex the casting techniques for such a massive ship must be.
