买单买双是什么意思

简介：His Highness the Crown Prince could think that he, an old man who had been idle for more than ten years, was already a surprise to him. The joy in his heart was even more overwhelming when he completed the mission of the Crown Prince. Although he is a great scholar of the generation, famous all over the world, and has seen many big events, But at this time, I couldn't help but want to sing a song.