Complex sentence: But afterwards, the empress of HanGaoZu (the emperor) killed his lover Mrs Qi cruelly, consequently, Qi's attendant, a girl was dismissed out of the palace and married a civilian, so the custom in the palace was in circulation.
Split into simpler sentences: But afterwards, the empress of HanGaoZu (the emperor) killed his lover Mrs Qi cruelly. Consequently, Qi's attendant, a girl, was dismissed from the palace and married a civilian, so the custom in the palace was in circulation.