Leibniz was writing letters to friends in China, and he had more than 30 pen pals in the Nanjing area alone.
However, the current letter is addressed to Zhao Zhenfang:
"His Royal Highness PrincessI have received your letter. I am deeply saddened to learn that the great mathematician Mr. Xiao Shixuan has passed away. This is a great loss for mankind all over the world"
"The "Book of Changes" translated by European scholars in Nanjing, I have recognized
"I"
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