Power punch to the body – Parry Block And Punch (搬攔捶)
Fist strikes also exist in Taijiquan (太極拳). Step forward parry block and Punch (搬攔捶) that is memorized as a hard punch because it is created by the body step forward momentum and the lower back twisting power with the coordination of the blocking power.
If you want to damage ribs and organ, throwing the fist into the body is easier and simpler way than the open-palm strikes.