Chinese traditional culture identifies seven types of circumstances in which one should not play the Gu-qin:
- When there is a high wind or heavy rain;
- When in a mood of great sorrow;
- When one's dress is untidy;
- When drunk and crazy;
- When one has not burned incense;
- When one does not understand music or is in rude surroundings;
- When one has not bathed or the place is dirty.
References
Seven Should-not-plays (Chinese Music) Wikipedia(Text) CC BY-SA