Piguaquan
Piguaquan "chop-hanging fist", also known as Piguazhang "chop-hanging palm" due to its emphasis on palm techniques, is often practiced along with Bajiquan It features explosive, long-range power.
Piguaquan's power is from the accelerational force of the arms which are often in rotation. The hip movement in Piguaquan is more subtle and gentle compared to Baijiquan, because you only need enough to guide the big chops whereas in Bajiquan, the hammers, punches, elbows and swings rely completely on the quick and powerful rotation of the hips, and sink to bring its power out.
It is often said that originally, Bajiquan and Piguaquan were the same art, but split hundreds of years ago.
Li Shuwen remarried the two systems in the late 19th to early 20th century and today these two styles are often taught as complementary arts, especially in Taiwan. In fact, there is a Chinese martial arts proverb that goes: "When pigua is added to baji, gods and demons will all be terrified. When baji is added to pigua, heroes will sigh knowing they are no match against it."
In Mainland China, Piguaquan is still often practiced as a stand-alone art as well.