that during qing ming, your ancestor will be visiting you in a form of insect, you will be happy to see an insect especially cricket, beetle etc... flying into your house.
For me, I am sitting about 1 m from a cricket but it was hidden in a gap. My camera is some at another side of me n I am blocked by that cricket. Not a small one, at least 5 cm!!! Cannot kill it, must try to get the photo of it.