Not sure if Shang can take full credit for that strike, as Stark was shown making him some type of weapon/s in the previous issue, and in later Avengers issues, he was shown using both energised nunchucks and energised wrist bands.
... I think Shang probably can take credit for that strike after all. I wasn't sure, because Tony was shown making him some kind of weapon or weapons one issue earlier (we couldn't see exactly what he was making at the time), and when Shang fought Gorgon in a later issue, he was apparently wearing some type of energised wrist bands, which I assume were Tony's creations.
However, in-between those issues, there was another issue where he whipped out a pair of energised nunchucks. And that issue included a flashback to the scene where Stark was shown making something for him. So it appears that the nunchucks were the weapons being made there, and the wrist bands were presumably made some time later. As I said, I don't even know for sure that the wrist bands were made by Tony; I just assumed that, since he clearly made the nunchucks.