What is the longest you've gone without sleeping to work on a song?

你为了一首歌，最长时间不睡觉工作是多久？

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While the song "Sleeping" was playing, Liner and guest were talking about some musical instrument. At that time, Ggong thought they were speaking some foreign language.

播放“睡觉”这首歌时，Liner和嘉宾正在讨论乐器，孔刘觉得他们就像说外语一样。

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Song sung blue weeping like a willow, song sung blue sleeping on my pillow.

唱一首忧郁的歌如柳丝般哀然落泪，唱一首忧郁的歌在我枕边慢慢睡去。

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"The bird doesn't actually hear his song when he is sleeping, because he is not producing any sound, " said Dr Deregnaucourt.

BBC: NEWS | Science/Nature | Sleep helps birds sing better