Jay Chow Can't Shed Tears and Rather Shed Blood on Camera?

I had read it that Jay Chow would rather do blood scenes than crying scenes on camera. Somehow in that article, he reveals the only real time he cried openly was when his mother punished him when he refused to let his true potential in piano came out. I wonder how true this is. Well I think it is looking at how he hasn't cried on screen yet even in the rather sad movie "Secret" or in the rather intense "Curse of the Golden Flower".