Who is the conqueror of China and the unsheathed Sword of Allah?

Muslims did not conquer the entirety of China. Instead, they conquered its peripheries and some of its cities in the year 96 AH, under the leadership of Qutaybah ibn Muslim Al-Bahili. He negotiated a treaty with the King of China for jizya, whereupon the king sent vast sums of money and soil from his land for Qutaybah to tread upon, so that he could fulfill his oath. As for the title "Sword of Allah," it belongs to the Companion Khalid ibn Al-Walid, who had passed away before this period.