The Study of the Smashing Fist in Xingyi (形意崩拳學) from The Study of Xing Yi Quan (形意拳學)

形意崩拳學

崩拳者，屬木，是一氣之伸縮，兩手往來之理也。勢如連珠箭，在腹內則屬肝，在拳中即為崩，所謂崩拳如箭，屬木者是也。其拳順則肝氣舒，其拳謬則肝氣傷。肝氣傷則脾胃不和矣。其氣不舒，則橫拳亦必失和矣。此拳善能平氣舒肝，長精神，強筋骨，壯腦力，故學者，當細研究也。

孫祿堂

"The smashing fist is classified with wood and it contains the unified Qi of stretching and contracting, and both hands going back and forth in order. The motion is like a succession of arrows, in the body it belongs to the liver, in boxing it is smashing. It is said it is like an arrow, its category is wood. When the boxing is appropriate, the Qi in the liver will be comfortable. If the boxing is irregular, it will injure the liver’s Qi. If the liver’s Qi is injured, the spleen and the stomach will not work with each other. An irregular Qi in the liver will put the crossing fist in disharmony. This fist can make an even Qi to unfold in the liver, enhance the vitality, strengthen the tendons and the bones, and fortify the brain. For these reasons students should study it in detail."

From the book The Study of Xing Yiquan (形意拳學), by Sūn Lùtáng (孫祿堂), based on the translation by Albert Liu and Dan Miller.

The Song of Bēng​quán (崩拳歌) by Jiāng Róngqiáo (薑容樵)

崩拳歌

崩拳似箭性屬木，
生炮克橫理不謬，
兩拳輪流循環進，
牢記左前右足跟。

薑容樵

"Bēng​quán is like an arrow, its nature is affiliated with wood.
It produces Pao and overcomes Heng, the theory is not absurd.
The two fists advance in alternate cycles.
Keep in mind that the left is in front and the right foot follow closely."

From the book Xing Yi Mother Fists (形意母拳), by Jiāng Róngqiáo (薑容樵), based on the translation by Joseph Crandall