The concubine Gu Liuli was sent to the palace to be a chess piece. She appears to be docile, but in reality she plans her harem with a chess game mentality. A game of chess, the Nine Layers Palace, she uses the chess pieces as bait, the chess game as a sword, and moves forward step by step on the chessboard of power. When she used the power of the court to check and balance the harem, and asked the emperor to say in person: "Half of this country is given by you." At that moment, she understood that after ten years of planning, the real chess player was never the emperor.