Upon Cheng Zixiao's mention of the involvement of the military, Hua Yan immediately acknowledged this possibility and wasted no time in sending another letter to Su Zizhan, warning him that once he arrived in the Northern Region, he must remain out of sight until she could join him. Should he expose himself, it would certainly be perilous.
After all, Su Zizhan had been dispatched to the Northern Region to address the disaster there on Yun Chi's command. Although Yun Chi had not appointed him to any official position, he granted him the authority to investigate the matter independently.
This significant authority was known publicly in the court; hence, at present, everyone knew that Su Zizhan had departed for the Northern Region.
And the people of the Northern Region should have already received the news.