The Daredevil episode "World on Fire" (S01E05) sees one of Madame Gao's couriers deliver a package to Vladimir's men. While he sits in the car and the Russians get inside he sings some Chinese song, until the situation escalates due to Daredevil's intervention and the courier inadvertently gets shot.
Now the situation with madame Gao's couriers and helpers has always been interesting due to the fact that they are actually all blind. I wonder if that Chinese song has any further relevance or if it's just some random distraction to support the mood of the scene. So is that some common Chinese folk song and do its lyrics or meaning relate to that situation and its themes in any way?