He knew what the Emperor meant—it was time to pass the scepter of power, and it was time for him to relinquish his authority to the Emperor. However, the current Emperor still made him feel uneasy.
It was clear today that one person had to step back, and the Emperor could no longer afford to do so. If the Emperor backed down today, the awe that had been established would vanish before the courtiers, and might even cause fundamental upheaval in Great Nan.
With unrest at the border, troubles should not be stirred in court. If exploited by those with ulterior motives, there might be rebellion in the capital, leading to Great Nan being attacked on both fronts.
Besides, the ruler of Yue Kingdom would probably suffer as well.
He currently controlled the government, and some were already discontent. It wasn't that he didn't want to give up power; he wanted to teach the Emperor, so he could be an Emperor he could give up power to.