Context : Song at Midnight (simplified Chinese: 夜半歌声; traditional Chinese: 夜半歌聲; pinyin: Yè bàn gē shēng) (also known as Singing at Midnight or literally Voice of Midnight) is a 1937 film directed by Ma-Xu Weibang. 
Subject : Song at Midnight 
Relation : based on
Which is the basis of Song at Midnight?