Duke Su is one step ahead of Chancellor Li, carefully planning how to rectify the situation at Dingzhou, so Fang Fei can return to the capital to redress the false accusations against her father. The emperor receives many memorials to punish Fang Fei as soon as she arrives the capital. Before being imprisoned, Fang Fei beats the Dengwen Drum and the people soon follow suit to support her. The emperor uses this opportunity to catch the deceitful officials and clean the imperial court. (Source: frankly at MyDramaList)