Leitmotif

Demystification

“Martial art is science, not myth” (拳学是科学而不是神话). In his principal work (1988) Yao Zongxun rejects occult myths five times over: the empty force (空劲), killing by pressure point (点穴), “running over walls and roofs”, the doctrine of generation through the five phases, and mystery-mongering in general (神秘). This is the sharpest primary contrast to the empty-force line around You Peng Xi and Liang Zi Peng — “Yiquan” is no monolith: on 空劲 the main and southern lineages stand opposed. Put positively, mechanics supplies the sober counter-explanation: fighting force is trained bodily force (劲 jìn = 力 lì, not 气 qì), resting on action and reaction and on the ground reaction — “you need not believe me, the phenomena are all verifiable”.

A leitmotif, not an aside

A principle runs through the lineage Wang Xiangzhai → Yao Zongxun that separates Yiquan from much of its surroundings: martial art is science, not mystery. Yao Zongxun's formulation: 拳学是科学而不是神话 — boxing knowledge is science, not myth.

This is not a modern reinterpretation by Western readers. Wang and Yao explicitly reject occult and supernatural claims and ground Yiquan physiologically, mechanically and psychologically.

What is rejected by name

空劲, “empty force” — striking at a distance without contact. It does not exist in real fighting; it is a “mystification of Yiquan”. At most a conditioned reflex between teacher and student, of no practical value.
点穴, death-touch pressure points — with real fighting power any point of impact is effective; fixed secret points with timing tables are nonsense.
Running on walls and flying swordsmen — pure fiction from the Wuxia storytellers.
Secret teachings as such — “fundamentally absurd”, arising from little knowledge.
Five-phase logic as combat doctrine — in a fight measured in seconds there is no time to calculate.
The name 大成拳 itself (“great achievement”) — 学术本无止境: scholarship has no end point.

What is notable about the list: it points inward. What is rejected is not what other schools claim, but what is told about one's own system.

Hollowing out, not throwing away

Demystification does not discard classical cosmology entirely; it hollows it out. From the Five Phases the five images of force remain, not the generating and overcoming cycles. From Taiji the Yin-Yang dialectic remains as a mechanical principle of opposing force (Zheng Li), not the metaphysical elevation.

The common denominator is simple: what works verifiably and mechanically is kept; what merely explains or mystifies is discarded.

Into the third generation

Bo Jiacong, a student of Yao Zongxun, calls scientific rigour explicitly the “watershed and touchstone” between genuine and false Yiquan — and quotes Yao's remark that without education one cannot practise Yiquan. The system demands study, not initiation.