well, I am not quite sure
Mandarin might have had its origin more than 2000 year ago when China was before Qin.
It may not have took the prominence in Yuan Dynasty. Because the most discriminated nationality of Yuan is Han (That partly depended on how later the nation surrendered, unfortunately Han was the last one :wink: ).
But I am not sure what the official language at that time. In my point of view, Mongolians had no characters for their language.
After Yuan was Ming.
Originally the capital of Ming was located in the now Nanjing
The city was chosen by the first emperor of Yuan, a peasant, the typical first emperor of China :wink:
Before he died, his oldest son died first.
At the time he was on the verge of the death, he chose his grandson.
His grandson was not a smart one. After he took power his advisors tried to persuade him to kill his uncle, Zhu Di, who was once the rival with him for the reign. But he didn't do that.
He appointed Zhu Di the King of Yan.
Yan was a former name of Beijing. It was an extremely poor place at that time. And the city was continuously being annoyed by the Mongolians who still dreamed of the Genghis Kuan Empire.
the King of Yan didn't give up.
He boosted the economy and trained troops. Soon the Mongolians were no longer a threat. Then he prepared the battle for the reign.
He succeeded at last. And then he moved the capital from Nanjing to Beijing.
I think Mandarin became the official language from that time.
btw, In CHinese, Nanjing means "southern capital" and Beijing means "northern capital" :wink:
Bram, you know the Nanjing Massacre?