Trong van hoa Viet Nam, viec dong tho xay nha duoc xem la mot trong nhung su kien trong dai nhat cua doi nguoi. Chon sai ngay co the khien gia chu bat an, gap nhieu tro ngai. Bai viet nay phan tich 5 han lon can kiem tra truoc khi dong tho, cung voi cac sao tot xau can luu y.
Han 1: Kim Lau
Kim Lau la han dau tien va pho bien nhat. Cong thuc tinh giong nhu cuoi hoi:
Pham Kim Lau khi ket qua la 1, 3, 6, hoac 8.
- 1 — Kim Lau ban than: Anh huong suc khoe gia chu, co the gap tai nan trong qua trinh xay dung.
- 3 — Kim Lau con cai: Anh huong den con cai trong gia dinh.
- 6 — Kim Lau kien tai: Anh huong tai chinh — xay xong co the mat tien, pha san, no nan.
- 8 — Kim Lau no lenh: Gia dinh bat hoa, tranh chap nha dat.
Han 2: Hoang Oc
Hoang Oc (nha hoang) la han dac trung cho viec xay nha, khong ap dung cho cuoi hoi hay khai truong.
Pham khi ket qua la 3 (Tam Dia Sat), 5 (Ngu Tho Tu), hoac 0/6 (Luc Hoang Oc).
- So 3 — Tam Dia Sat: Dat dai khong yen, nen mong khong vung. Kieng dong tho.
- So 5 — Ngu Tho Tu: Lien quan den cai chet, benh tat. Rat nang.
- So 6 (hoac 0) — Luc Hoang Oc: Nha hoang, nha vang — xay xong co the khong o duoc, phai ban hoac bo hoang.
Cac so con lai (1, 2, 4) la an toan. So 1 la Nhat Phat (phat tai), so 2 la Nhi Vuong (vuong thinh), so 4 la Tu Tien (tien bo) — deu tot.
Han 3: Tam Tai
Tam Tai la chu ky 3 nam xau, xoay vong theo tam hop Chi cua nam sinh:
- Than - Ty - Thin: Tam Tai vao nam Dan, Mao, Thin
- Dan - Ngo - Tuat: Tam Tai vao nam Than, Dau, Tuat
- Ty - Dau - Suu: Tam Tai vao nam Hai, Ty, Suu
- Hai - Mao - Mui: Tam Tai vao nam Ty, Ngo, Mui
Trong 3 nam Tam Tai, nam giua la nang nhat. Vi du, nguoi tuoi Than gap Tam Tai nam Dan-Mao-Thin, thi nam Mao la nang nhat.
Tam Tai dai ky xay nha, dong tho, lam nha moi. Tuy nhien, sua chua nho (son lai, thay ngoi) van co the duoc neu chon ngay tot.
Han 4: Thai Tue (5 loai)
Thai Tue la han lien quan den quan he giua Chi nam sinh va Chi nam hien tai. Co 5 loai Thai Tue:
- Thai Tue (Truc): Nam hien tai trung Chi nam sinh. Vi du: tuoi Ngo gap nam Ngo. Anh huong truc tiep, nhieu bien dong.
- Xung Thai Tue: Chi nam hien tai xung voi Chi nam sinh (cach 6 vi tri). Vi du: tuoi Ty gap nam Ngo. Day la loai nang nhat — tuyet doi nen tranh dong tho.
- Hinh Thai Tue: Quan he Tam Hinh giua hai Chi. Vi du: Ty-Mao, Dan-Ty, Suu-Tuat. Gay tro ngai, kien tung.
- Hai Thai Tue: Quan he Luc Hai. Vi du: Ty-Mui, Suu-Ngo, Dan-Ty. Ton that, that thiet.
- Pha Thai Tue: Quan he Luc Pha. Vi du: Ty-Dau, Suu-Thin, Dan-Hai. Pha vo ke hoach.
Han 5: Ngu Hanh Nap Am
Moi nguoi co mot menh Ngu Hanh dua tren Nap Am cua nam sinh (theo bang 60 Hoa Giap). Khi xay nha, can kiem tra Ngu Hanh menh gia chu co tuong khac voi Ngu Hanh cua nam dong tho hay khong.
- Tuong sinh (tot): Kim sinh Thuy, Thuy sinh Moc, Moc sinh Hoa, Hoa sinh Tho, Tho sinh Kim.
- Tuong khac (xau): Kim khac Moc, Moc khac Tho, Tho khac Thuy, Thuy khac Hoa, Hoa khac Kim.
Uu tien chon nam dong tho co Ngu Hanh sinh menh gia chu (tot nhat) hoac cung menh (binh hoa). Tranh nam co Ngu Hanh khac menh gia chu.
Sao tot can co khi dong tho
Ngoai viec tranh 5 han tren, ngay dong tho nen co cac sao tot (cat than) sau:
- Sinh Khi: Sao chuyen ve xay dung, tao dung — quan trong nhat cho dong tho.
- Thien An: On hue tu troi — mang lai may man, thuan loi.
- Thien Duc / Nguyet Duc: Hai sao bao ho lon, co the giam bot anh huong cua hung than.
- Tam Hop / Luc Hop: Ngay hop tuoi gia chu — diem cong dang ke.
Sao xau can tranh
- Thien Hoa: Sao hoa hoan — dai ky xay nha, co nguy co chay no.
- Tho Phu: Sao Tho xau — lien quan den dat dai, nen mong khong vung.
- Tho On: Dich benh tu dat — gia dinh hay dau om sau khi xay.
- Nguyet Pha: Pha vo — xay nha bi do dang, hong hoc.
- Dai Hao / Tieu Hao: Ton tai, mat cua — chi phi xay nha phat sinh nhieu.
Muon tuoi khi pham han
Neu gia chu pham Kim Lau hoac Hoang Oc, giai phap truyen thong la muon tuoi — nho mot nguoi than (thay, cha/me, anh/chi/em) dung ten lam gia chu thay. Nguoi muon tuoi phai:
- Khong pham Kim Lau, Hoang Oc trong nam do
- Khong pham Tam Tai, Thai Tue
- Thuong la nguoi lon tuoi, uy tin trong gia dinh
- Dong y va tu nguyen cho muon tuoi
Nguoi muon tuoi se la nguoi dong tho dau tien (cuoc nhac dau tien), sau do gia chu moi tiep tuc cong viec xay dung.
Thang kieng: Thang 5 va Thang 7 AL
- Thang 5 AL (Ngu Doc): Dan gian goi la thang "doc" — thoi tiet nong buc, sau benh nhieu. Truyen thong ky dong tho vao thang nay.
- Thang 7 AL (Co Hon): Thang xa toi co hon — dai ky moi viec lon, dac biet xay nha va dong tho.
Cac thang tot cho xay nha: thang 2, 3, 8, 9, 10 AL. Trong do, thang 3 va thang 8 duoc xem la ly tuong nhat.