verb · To celebrate peace and prosperity with songs and dance; a scene of social stability and joy.

节日里的广场上歌舞升平，呈现出一派欣欣向荣的景象。

idiom · To create a false impression of happiness and prosperity, often to ignore or hide underlying social crises.

尽管边境战事吃紧，城内依然歌舞升平，粉饰太平。