◇ Just read — no move neededA pawn first, a cannon in reply
Red's gentlest first move is 兵七进一, the angel's move (仙人指路) — it develops nothing yet, but commits to nothing either, and improves a pawn. Black's sharpest reply is 炮2平3, the pawn-base cannon (卒底炮): the cannon slides behind its own 3-pawn and stares down Red's advanced soldier. Red gains flexibility; Black gains a ready-made target on the c-file. The middlegame is mutual entanglement — 互缠.