The current head of the Qinghe Cui family, Cui Yao, was the biological father of Duke's wife.
By pushing the horse to an extreme pace, a message sent from the Capital City would arrive in Qinghe Cui family residence in three days.
Upon receiving his daughter's letter, Master Cui was greatly startled. He had not expected the two hundred secret guards he had assigned to his grandson, Zhou Gu, to have mostly perished, leaving only a dozen or so remaining. Meanwhile, the secret guards who had accompanied Zhou Gu since his childhood were either injured or dead. Only a handful remained.