Gu Qing is walking his dog when an accident transmigrates him to the Ming dynasty, where he becomes the starving magistrate of Tianchang County.
At his most desperate, Gu Qing awakens the Myriad Worlds Marketplace System. As long as he has money, he can exchange it for anything.
So Gu Qing sets out on a relentless quest to make money. Along the way, he unexpectedly meets Zhu Yuanzhang and becomes sworn brothers with him…
Zhu Yuanzhang: You're saying you can find where the remnants of Northern Yuan fled to on the grasslands?
Gu Qing: Yep! That's easy as pie!
Zhu Yuanzhang: I owe it to your medicine! If your sister-in-law had come down with smallpox, I wouldn't have known what to do.
Gu Qing: Come on! We're brothers. No need for all that formal talk.
Gu Qing: Wait, you said your son is called Zhu Biao? He went to Xi'an and is now gravely ill, on the brink of death, and needs treatment?
Zhu Yuanzhang: That's right! Hurry up! If we get there too late, my son will be gone!
As Gu Qing is hauled into a carriage, he falls into deep thought. How did I become brothers with the legendary butcher Zhu?
When Zhu Yuanzhang and Zhu Biao place an edict appointing Gu Qing as the Ming dynasty's first Prince of a Different Surname before him, Gu Qing says with a smile:
“You... you've really put your humble prince in a bind”…
Why is your timeline a bit messy to me?