How to Read Two Major Stars Sharing a Palace in Tu Vi, and Why Are There Exactly 24 Combinations?

Why do 14 major stars form only 24 same-palace combinations?

The 14 major stars are not placed freely across the 12 palaces. They are bound into six fixed groups, each headed by one star of the Tu Vi family, and the position of the whole group shifts only with the position of the Tu Vi palace. This constraint is what locks the number of two-major-star same-palace combinations at 24, no more.

The six groups are:

• Tu Vi-led group: Tu Vi, Thien Co, Thai Duong, Vu Khuc, Thien Dong, Liem Trinh.
• Thien Phu-led group: Thien Phu, Thai Am, Tham Lang, Cu Mon, Thien Tuong, Thien Luong, That Sat, Pha Quan.

The book Dau So Tinh Thanh (volume 1) ranks Tu Vi and Thien Phu as the two strongest stars, followed by Thai Duong, Thai Am, Vu Khuc, Thien Dong, Thien Tuong, Thien Luong, Thien Co, while Liem Trinh, Tham Lang, Cu Mon, That Sat, Pha Quan form the group carrying an inauspicious flavor, decent when mieu or vuong, heavy when ham. This grouping matches the same-palace structure: the group traveling with Tu Vi mostly belongs to auspicious stars, while the group traveling with Phu contains Sat Pha Tham.

Because each pair appears only in certain earthly branches, learners need to memorize both the pair and the palace, not the stars in isolation. Below is a table of the 24 combinations, the branch pair where they share a palace, and the relative mieu/ham level of each star.

The levels in this table follow a common convention; some books differ in a few palaces, so use it for orientation only, not as a substitute for each school's own mieu/ham table.

Why exactly 24 pairs and not more?

Because each major star has only one fixed position relative to the Tu Vi palace, and two stars meet only when those positions fall in the same palace. If drawn out, each star in the Tu Vi group is offset by one palace from the next, and each star in the Phu group likewise, so they intersect exactly once at one branch pair. The 14 stars, combined by that rule, yield 24 same-palace pairs, no more and no less.

This has a practical consequence: when you see a chart with Tu Vi in Dan, you know for certain Thien Phu is also in Dan, and the Than palace will face that pair. No need to look up each star. For the same reason, pairs such as Tu Vi with Thai Am or Vu Khuc with Cu Mon do not exist in the system, even though beginners often mistake them.

How do the six Tu Vi and Phu groups differ?

The group traveling with Tu Vi leans toward a "ruling" mode: Tu Vi, Thien Co, Thai Duong, Vu Khuc, Thien Dong, Liem Trinh. The group traveling with Thien Phu leans toward "storehouse and transformation": Thien Phu, Thai Am, Tham Lang, Cu Mon, Thien Tuong, Thien Luong, That Sat, Pha Quan. The difference is not in fortune or misfortune but in how they operate.

According to Dau So Tinh Thanh, when Khoa Quyen Loc, Xuong Khuc, Ta Huu, Khoi Viet join in, the benign group of Tu Vi, Thien Phu, Thai Duong, Thai Am, Vu Khuc, Thien Dong, Thien Tuong, Thien Luong, Thien Co clearly gains power; conversely, the group of Liem Trinh, Tham Lang, Cu Mon, That Sat, Pha Quan, when properly combined, can still form a pattern of great wealth and honor. In other words, any group can be good; the question is where the pair sits and what it meets.

Reading each pair: do the two stars complement or pull each other?

Tu Phu sharing a palace in Dan and Than

This is the pair most cited in old books. Surviving old texts hold that Tu Phu sharing a palace in Dan or Than forms a good configuration, corresponding to the three talents and blessings (Tuyen Tap Bai Viet Tu Vi Chon Loc no. 8). Another source in Tuyen Tap Bai Viet Tu Vi Chon Loc no. 13 records that this pattern brings long life and few storms, but requires Ta Phu, Huu Bat, Thien Khoi, Thien Viet to fully manifest; without them, the native tends to be conservative, content, and lacking breakthrough.

These two stars complement each other: Tu Vi gives authority, Thien Phu gives storehouse and management. But they also pull each other because both favor stability, so this pair tends to produce someone who preserves an estate rather than someone who opens a path.

Tu Vi with Tham Lang, That Sat, Pha Quan

Tu Tham in Mao and Dau, Tu Sat in Ti and Hoi, Tu Pha in Suu and Mui. The book Tu Vi Kinh Nghiem, lower volume, records that when Vu Pha sits in Ti or Hoi with Hoa Ky added, the native is often a person of many schemes and plans, suited to detective work; conversely, Tham Vu traveling together in Suu or Mui is truly good only with Quyen and Loc accompanying, and often follows a path of poverty first, wealth later. Tu Vi here plays the role of restraining the destructive tendency but cannot erase it. This is the "active" group, with outcomes depending on the major period and the supporting stars that join.

Liem Trinh and the Sat Pha Tham group

Vuong Dinh Chi Dam Dau So points out that the relationship between Liem Trinh and Sat Pha Tham splits into two: same palace and opposition. In Suu or Mui, Liem Trinh always shares a palace with That Sat; in Mao or Dau, it always shares a palace with Pha Quan; in Ti or Hoi, it always shares a palace with Tham Lang; and in Dan or Than, Liem Trinh opposes Tham Lang. Liem Trinh inherently carries a romantic flavor, and meeting stars of transformation easily produces upheaval, so the major period and the tam phuong must be examined before judging good or bad.

Tu Vi Kinh Nghiem, lower volume, records that Liem Sat in Suu or Mui is most ham, and with evil and killing stars it is very bad, prone to harboring resentment, reduced if Hoa Khoa is present. But this is where Vietnamese and Chinese books do not entirely agree: for the same Liem Sat pair, one edition reads it as a prison fate, another treats it only as a toilsome pattern, and only with supporting stars can a conclusion be drawn.

Co Luong, Dong Am, Cu Nhat: the "Co Nguyet Dong Luong" group

Dau So Tinh Thanh records a verse that Co Nguyet Dong Luong governs blessings and longevity, while Nhat Nguyet Ta Huu governs wealth and honor. This group includes Thien Co, Thai Am, Thien Dong, Thien Luong, and the corresponding same-palace pairs are Co Am in Dan and Than, Co Luong in Thin and Tuat, Dong Am in Ty and Ngo, Dong Luong in Dan and Than, Cu Nhat in Dan and Than, Duong Luong in Mao and Dau.

Vuong Dinh Chi Dam Dau So states clearly: when Thien Luong and Thai Duong form a star system, this is the best structure, because Thien Luong is inherently solitary and harsh, and Thai Duong dissolves it; therefore Thai Duong should be mieu or vuong, as in Ngo or Mao, better than Dau or Ty. Thien Luong in Ty receiving Thai Duong from Ngo is better than Thien Luong in Ngo receiving Thai Duong from Ty. The same pair, reversed in palace, changes in quality.

Tuyen Tap Bai Viet Tu Vi Chon Loc no. 2 records that when Thien Luong rules alone in Ti or Hoi, with Thien Dong opposite, this is a ham position; a person with this pattern who does not meet auspicious stars will struggle to achieve greatly, and mostly will not prosper much. Yet if born in the years At, Binh, Mau, Nham, even with many auspicious stars, they can still attain wealth and honor, only the career must pass through hardship, and early growth may be great while the whole life is toilsome.

Dong Am and the yin-yang flavor

Tu Vi Kinh Nghiem, lower volume, records that Thai Duong meeting Hoa Ky is still in position, called Khanh van phung Nhat; Thai Am meeting Hoa Ky is also in position, called Khanh van phung Nguyet. But Am Duong when ham is called phan boi, very bad for men, who must leave home and wander. The book also records a verse that many who fail to attain fame do so only because Nhat Nguyet contend in Suu and Mui; yet if they meet Ta Huu, Xuong Khuc, their reputation still rises. This is a clear example that a star pair does not by itself decide fortune or misfortune.

How do the schools read differently?

Vuong Dinh Chi's Trung Chau school does not read by isolated star pairs but by the twelve-board "star system": each palace is a combination of stars, and the meaning lies in the whole system, not in the same-palace pair. Vuong Dinh Chi Dam Dau So discusses Thai Duong by three general properties, comparing day and night palaces objectively, rather than assigning a fixed verse to each pair.

Vietnamese books such as Tu Vi Kinh Nghiem, lower volume, follow the verse-divination approach, assigning ready-made verses to each combination. This is easy to remember but easily altered by miscellaneous texts, turning a conditional verse into an absolute verdict. For example, "Liem Tham Ti Hoi" is read as a prison fate, while the original only says this pair easily produces upheaval and must be checked against the major period.

The books also disagree on how much heavier same-palace is than opposition. Some treat same-palace as strongest, opposition about seven parts, trine about five parts; others treat opposition as nearly equal in force to same-palace. Learners should follow one convention and state clearly which convention they follow.

What must be examined to read a star pair correctly?

A star pair is only a tendency. To read it correctly, place it within tam phuong tu chinh: the Menh palace, the opposite palace, the two trine palaces, and the Than palace. Supporting stars decide most of it: the same Tu Phu in Dan differs greatly with Ta Huu Khoi Viet versus only Kinh Da.

Dau So Tinh Thanh notes that strong stars combined into a high configuration are good at a high level, and the reverse is low; the power of a configuration does not lie in one star. Tuyen Tap Bai Viet Tu Vi Chon Loc no. 8 also cautions that when interpreting Tu Phu sharing a palace, one must consider age, yin-yang forward or reverse, the relation between Menh and Cuc and the Menh palace; if those four factors are good, even a ham star is not worrisome, and if bad, even a good star is reduced.

Finally, do not read a star pair as a predetermined fate. The same pair, for two people born in different hours and months, gives two different charts in supporting stars and period cycles. Tu Vi is a system describing tendencies, not a verdict.