Double Seal (雙封) — Six-Harmony Mantis

雙封 (Shuāng Fēng, "Double Seal") is the sixth and longest core sequence of Six-Harmony Praying Mantis (張詳三 line) — 39 postures that gather the branch's vocabulary into its capstone solo set. The "double seal" names its method of shutting both of the opponent's gates at once; the form runs through the intercepting hand (攔截手), the mother-and-child linked threading (子母連環穿), the golden-scissors hand (金剪手), the millstone hand (磨盤手), and the iron-cannon (鐵炮開城).

What it trains

• 雙封 (double sealing) — closing both lines simultaneously

• 子母連環穿 (mother-and-child linked threading) — the chained threading attack

• 金剪手 / 磨盤手 — the scissors and millstone hands

• 鐵炮開城 — "the iron cannon breaks the city-gate," the form's heavy finish before the shared close

Full posture script — 39 postures

The posture-name list (雙封) from the 張詳三 (Zhang Xiangsan) → 陳威伸 Taiwan Six-Harmony lineage, as published on the lineage site 6h-mantis.org, reproduced under fair-use citation; the English are the wiki's own working glosses. Six-Harmony movement names are descriptive and run longer than the tight four-character Seven-Star style.

Place in the curriculum

The 張詳三 Taiwan line teaches its empty-hand art as six core sequences (六趟) — 鐵齒 · 善手奔 · 鏡裡藏花 · 截手圈 · 葉底藏花 · 雙封 — alongside 六合短捶 and 六合拳. This is the sixth and longest of the six. All six core sequences share the same closing run: 進步跺腳 → 破膝 → 掛耳圈.

Videos

• Six-Harmony Mantis demonstration (雙封) — from the 張詳三-line lineage archive (6h-mantis.org / YouTube)

See also

六合螳螂 Six-Harmony Mantis — the branch, lineage, and character

Praying Mantis (螳螂拳) — the parent system and branch tree

Mantis Forms — the script-and-video map of every form

Sources

[1] The 張詳三 (Zhang Xiangsan) → 陳威伸 Taiwan Six-Harmony Mantis lineage, via the lineage site 6h-mantis.org — the published posture list (雙封), reproduced as a bare name-list under fair-use citation with the wiki's own glosses. Lineage: 魏德林 → 林世春 → 丁子成 → 張詳三.

[2] 六合螳螂拳, Chinese Wikipedia, and 徐紀 (Adam Hsu), 六合螳螂拳法述略 — for the branch's form inventory and "hidden-hard" (暗剛) character.