Recently, I finished reading another book, "Cherries of Changan". Set in the Tang Dynasty, this novel focuses on a humble official assigned an impossible task —— to bring fresh cherries from the southern part of China to the capital. Being limited by the technologies and transportation his time, he could keep cherries fresh for at most three to four days. However, to satisfy the emperor’s request, the official needed to find a way to keep them fresh for more than ten days. In pursuit of this goal, he encountered countless setbacks and problems, and consumed huge resources. Through this story, I came to understand the magic of power. The world seems to function to benefit those who hold it. So many people seem to struggle, like this humble official did, just to bring some cherries for some emperor to make him happy. Who cares about the efforts of one person who makes this happen? After all, only the powerful can leave their footprints in the history books.
You can't say "these days I finished" because "these days" is a period of time that includes the present.
You are "appointed" to a position (job), not a task.
It is he who is limited, not the cherries:
"Being limited by the technologies and transportation his time, he..."
Say "some emperor", not "the emperor", because now you are not talking about THE emperor any more. You are talking about some modern analog. Say "seem to struggle", rather than "struggle" because you are inviting a comparison between the real world and the world of the story.
I use single rather than plural for stylistic reasons:
"Who cares about the efforts of one person who makes this happen?"
By putting all the attention on one (imagined) person, you make the story more personal, and appealing to a reader.