My pen pal Zhu Yuanzhang

Description

The letters written by Li Han and his pen pal discussing the history of the Ming Dynasty traveled through time and space and were received by Zhu Yuanzhang.
When Zhu Yuanzhang saw the contents of the letter, his expression was very wonderful.
"Great, our Queen Ma is saved!"
"What, the fourth child actually rebelled against Zhu Yunwen?"
"The Jurchens replaced me, the Ming Dynasty, and established the Qing Dynasty? They actually lost their power and humiliated the country and betrayed our Han people?"
"Fourth Brother, you and Xu Da go and kill the Jian slaves for us!"
"The Barefoot Doctor's Handbook is a wonderful book, but we would also like The Companion of Dual-Use Talents even more!"
"We will lift sea restrictions, open up shipping routes, and discover new continents!"
"We want the industrial revolution!"
One day, when Li Han received a new version of the map of the Ming Dynasty "mailed" from the Ming Dynasty by Zhu Yuanzhang, he couldn't help but fall into deep contemplation.
When did the American continent become the territory of the Ming Dynasty?