[Although you were currently a mortal, your preparation for simulating this world was wholesome.
[You had memorized everything in your mind, be it the records of many modern scientific developments or various equipment-making methods.
[The Eldest Princess was a very smart woman. Otherwise, she wouldn't have been able to hold back for so long. Although she didn't understand much of what you said, she was also impressed by your wisdom and listened to your suggestions. She promised to find many people to assist you and delayed the announcement of your becoming the husband-in-name.]
...
[On the 23rd day, the Eldest Princess was very efficient. This morning, she found elites from all walks of life for you. The Ming dynasty had already developed the most basic cannon, so a lot of time was saved when it came to making gunpowder. Otherwise, just mining the raw materials would take a lot of time.
