The reason why Nangong Yan knew this was because she had been seriously ill recently. The abandonment of the Prince Consort, Yan Jiuchao's schemes, and the decline of the Queen Manor had made her heart ashen. Everyone thought that she was no different from the living dead, so they were no longer as careful as before in front of her.
She had heard a lot of things by accident, including Li Yu's conversation with an accomplice.
Li Yu said that he had gained the Empress's favor more and more. The Empress could no longer leave him. If this chess piece was used well, it could turn the court of Nanzhao upside down. At that time, it would be much easier for them to restore the country.
Although Li Yu was dead, his accomplices were still in the central palace. However, it was not important. They had already left.
