[tmd]

I ass u me (dangerous ground I know!) that you are talking about the upright fist short range strike so common in most stand up styles of kung fu - best defense? In the words of probably it's most famous practitioner is 'Don't be there' it is a very short close punch so side stepping or even stepping back will put you out of range, I personally would side step and using an open hand to the attackers forearm parry their punch away, this way you can either control the attacking arm or depending how much room your side step has created either strike with a shitaski to the kidney or mawashigeri chudan to the abdomen. It is always nice to test our tech s against other styles - please report back how you got on.