Bt thun Th t nt btTh t cc nt ch trong mt ch Hn gi l Bt thun. Th t nt bt tun theo mt s quy lut c nh(ng nhin cng c trng hp ngoi l)Quy tc1. Ngang trc s sau2. Phy trc mc sau3. Tri trc phi sau4.Trn trc di sau5. Ngang trc phy sau6. Gia trc hai bn sau7. Ngoi trc trong sau8.Vo trc ng sau9. Nt ngang y10. B quai xc11. Cc ch ngoi l1. Ngang trc s sau: thp: mi, s m (ST, 2 nt, b thp ) can: Thin can (DT, 3 nt, b can ) can chi: thp thin can (Gip, t, Bnh, inh, Mu, K, Canh, Tn, Nhm, Qu) v thp nh a chi (T, Su, Dn, Mo, Thn, T, Ng, Mi, Thn, Du, Tut, Hi) phong: phong ph, ti tt (TT, 4 ntb cn) cng: chung, cng li (gt, 6 nt, b bt ) th, : t (DT, 3 nt, b th ) s : Hc tr (DT, 3 nt, b s)2. Phy trc mc sau: () nhn: Ngi (DT, 2 nt, b nhn) nhp: Vo (gt, 2 nt, b nhp) # xut ra () bt: tm, s m (ST, 2 nt, b bt ) ph: cha (DT, 4 nt, b ph ) giao: a, trao (gt, 6 nt, b u) thin: tri (DT, 4 nt, b i )3. Tri trc phi sau Pht: c Pht (DT, 7 nt, b nhn) php: php tc, gio php (DT, 8 nt, b thy) tng: tng s (DT, 14 nt, b nhn) minh: sng (TT, 8 nt, b nht ) hnh: i (gt, 6 nt, b hnh ) nhn: nhn t, khoan dung, (DT, 4 nt, b nhn)4.Trn trc di sau nh: hai, s m (ST, 2 nt, b nh ) tam: ba, s m (ST, 3 nt, b nht ) lc: su, s m (ST, 4 nt, b bt ) nSm, bui sng (DT, 5 nt, b nht) thanh: xanh (TT, 8 nt, b thanh ) lp: ng (gt, 5 nt, b lp ) ngn: ni, li ni (gt/DT, 7 nt, b ngn )5. Ngang trc phy sau t: bn tri (DT, 5 nt, b cng ) hu: bn phi (DT, 5 nt, b khu ) bt: khng (PT, 4 nt, b nht ) i: to, ln (TT, 3 nt, b i ) phu: ngi n ng (DT, 4 nt, b i ) hu: bn (DT, 4 nt, b hu )6. Gia trc hai bn sau tiu: nh, b (TT, 3 nt, b tiu ) /trn: bi (DT, 6/14 nt, b tiu /b th) thy: Nc (DT, 4 nt, b thy) mc: cy, g (DT, 4 nt, b mc ) tim: nhn u (DT, 6 nt, b tiu ) phi: chng phi, khng phi (PT, 8 nt, b phi )7. Ngoi trc trong sau chu/chu: vng; quanh (DT, 8 nt, b khu) phong: gi (DT, 4/9 nt, b phong ) vn: Hi (gt, 11 nt, khu) ng: cng 1 loi, ging nhau (TT, 6 nt, khu) nguyt: mt trng (DT, 4 nt, b nguyt ) dng: dng (gt, 5 nt, b dng) nhn: thong th (TT, 12 nt, b mn )8.Vo trc ng sau in: rung t (DT, 5 nt, b in) nht: mt tri (DT, 4 nt, b nht ) vit: ni rng (gt, 4 nt, b vit ) mc: con mt (DT, 5 nt, b mc ) nhn: Nguyn do (DT, 6 nt, b vi ) t: bn, s m (ST, 5 nt, b vi )9. Nt ngang y ton: y , ton vn (TT, 6 nt, b nhp) cng: ngi th (DT, 3 nt, b cng ) Vng: vua, cha (DT, 4 nt,b Ngc) th, : t (DT, 3 nt, b th ) s : Hc tr (DT, 3 nt, b s) nhm: can Nhm (DT, 4 nt, b s )10. B quai xc o: ng, o l (DT, 13 nt, b sc , ) /bin: bn cnh (DT, 5/19 nt, b sc , ) /t c; t n (gT, 6/13 nt, b sc , ) /tin: tin (gT, 7/12 nt, b sc , ) /xa; vin (TT, 7/14 nt, b sc , ) phn: Tr li (gT, 7 nt, b sc , ) cn: gn (TT, 8 nt, b xc , ) kin: dng ln, thnh lp (gT, 9 nt, b dn)11. Cc ch ngoi l Phn trn ca cc chtheo quy tc gia trc, hai bn sau. Cc chkhng theo quy tc ny / hc: hc (DT, 8/16 nt, b t) /gic: Hiu ra, tnh ng (gt, 9/20 nt, b kin /) Cc nt phy (xin tri) c vit trc trong cc ch sau: Cu Cp . Cc nt phy (xin tri) c vit sau trong cc ch sau: Lc , ao ao: ao, dao (DT, 2 nt, b ao) lc: sc (DT, 2 nt, b lc) Tm (DT, 3 nt, b tm) Mt hnh thc ca b tm . Ha: la (DT, 4 nt, b ha )