Qingluan Does Not Return

The princess of a subjugated country is captured by the prince of an enemy country. The prince appears to be cold, but in fact he secretly protects her. The princess discovered that the prince was poisoned and needed to use the "Qingluan blood" in her body as a medicine. However, the prince had already given up treatment and planned to help her return to the country. In the end, the princess volunteered to die to save the prince. The prince died in love after ascending the throne and turned into a blue bird to protect the mountains and rivers of his motherland.