The translation mentioned something of the sort, but I wasn't clear, since it was a translation, whether there was physical contact, since there are numerous references in the translations to fatal blows which obviously weren't. Here's the passage from chapter 22.
Suddenly, he felt a breeze in the back. In his shock, Zhang WuJi
reflexively flew up, only to hear two very low sounds passing under him.
As he twisted back, he saw Ban ShuXian and He TaiChong’s swords stabbing
into XianYu Tong’s chest. This is a special Kun Lun technique, called
‘No Sound No Form’, used for night battles. Of course, it’s also perfect
for sneak attacks in the daytime. Unfortunately, they did not know that
Zhang WuJi’s Jiu Yang Shen Gong automatically alarms Zhang WuJi of back
attack, allowing him to get out of the way in time. After their miss,
the He couple’s thoughts were, “If we don’t kill him today, how can we
still have the face to live?” They turned around and attacked again,
using only offensive moves, disregarding their own safety. After Zhang
WuJi dodged a few attacks, he began to wonder just how to stop this
couple.
Why did they attack Xianyu Tong anyway?