Although my main interest is Tai Chi, my Sun style teachers also shared the Xingyi they had learned.
I am in no way proficient in it so this is just me having a go. Neither do I teach any of it as my understanding is very basic and my Instructor Certificate authorises me to teach Sun style Tai Chi only.
All mistakes are mine. I actually find this much harder than Tai Chi even though it appears simpler on the surface. But I like it!