How did ancient islam impact ancient china?

According to the historical accounts of Chinese Muslims, Islam was first brought to China by Sa'd ibn abi Waqqas, who came to China for the third time at the head of an embassy sent by Uthman, the third Caliph, in 651, less than twenty years after the death of prophet Muhammad. maybe this is the answer

who was the head of the bureau who was the head of the bureau

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explanation:

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