Zhengcai is the element controlled by the Day Master of opposite polarity — e.g. a 甲 (yang wood) day master "controls" 己 (yin earth) as Zhengcai. It represents stable, predictable wealth: salary, savings, real estate income, and money earned through diligent labor.
Healthy Zhengcai gives reliability with money, careful budgeting, and steady financial growth. In male charts it represents the legal wife. Excessive Zhengcai can be miserly or stuck in conventional thinking; too weak indicates financial scarcity or lack of structure around money.
The ten-god vocabulary took its familiar shape in the Ziping (子平 zǐpíng) method, which fixed the Day Master, the heavenly stem of the birth day, as the single point of reference for a chart. Tang-dynasty practice associated with Li Xuzhong (李虛中 Lǐ Xūzhōng) had read fate from the year pillar instead. Once the day stem became the anchor, whatever that stem conquers was classed as Wealth. Ming compilations such as Yuanhai Ziping (淵海子平) and Wan Minying's Sanming Tonghui (三命通會) describe wealth as the substance that feeds a life, which is why the same star was also handed the roles of spouse and household provider.
Reading Zhengcai is less about counting occurrences than about locating them. A Wealth star exposed in a heavenly stem shows in visible circumstances; one hidden inside an earthly branch works quietly and was often considered the more durable of the two. When the month branch holds Wealth and that Wealth also surfaces in a stem, the traditional verdict is a Regular Wealth structure, a life whose income runs through ordinary, sanctioned channels. Position then colours everything: the day branch is the spouse seat, the year pillar speaks of family background and early years, the hour pillar of later life and children. Position comes before quantity because treating an abundance of Wealth stars as an abundance of wealth is precisely what classical practice tends to contradict. When Wealth is heavy and the Day Master is weak, the old description is a rich house with a poor man living in it: resources that cannot be held, or that consume the person holding them. A modest Wealth star backed by output stars and a rooted Day Master was regularly judged the stronger position. Zhengcai also does not mean cash as such; in classical vocabulary it names whatever the self can reliably govern, which may be a wage, a role, or other people's trust.
Zhengcai and Piancai (偏財 piāncái, Indirect Wealth) are one relationship split by polarity. Opposite polarity yields the retainable version: salary, rent, slow accumulation. Matching polarity yields the mobile version: deals, timing, money that passes through the hands. Wealth in turn feeds the Officer stars, so classical practice reads Wealth and Zhengguan (正官 zhèngguān, Regular Officer) as links in one chain, not as two separate subjects. Upstream sit Shishen (食神 shíshén) and Shanguan (傷官 shāngguān), the output stars that generate Wealth; a chart holding Wealth with no output star was often read as good at keeping money and poor at making more.
Traditional readings disagree on several points, and it is fairer to say so than to flatten them. In kinship assignment most manuals give Zhengcai as the wife in a man's chart and Piancai as the father, while other lineages treat the Wealth stars as a single category and decline to split them. On usability, one camp insists a weak Day Master must be reinforced before Wealth can be used at all; another holds that a slightly weak self can still carry Wealth when the month branch gives it root and an Officer star guards it. Readings of Wealth in women's charts have shifted the furthest of all.
Wealth is among the easiest ten gods to watch across luck pillars and annual pillars, and classical method keeps its eye on the Day Master instead of on the Wealth star itself. A strong self entering a Wealth period is usually read as income and obligation arriving together; a weak self entering the same period is more often read as exertion and depletion. Because Wealth also generates the Officer stars, a Wealth period tends to bring institutional pressure in its train — one reason the older texts speak of wealth and office as a single chain rather than two fortunes.
Both are the element the Day Master conquers in a Four Pillars chart; polarity separates them. Zhengcai (Regular Wealth) has the opposite polarity to the Day Master and stands for steady, foreseeable, accumulable income such as salary, rent and savings. Piancai (Indirect Wealth) shares the Day Master's polarity and stands for mobile or opportunity-driven money: commissions, ventures, funds passing through the hands. In traditional kinship assignment a man's chart reads Zhengcai as the wife and Piancai as the father. Neither is ranked above the other.
Traditional practice does not read it that way. What counts is the ratio between the Day Master and the Wealth stars. Heavy Wealth over a weak Day Master is described in the old texts as wealth that cannot be held: money arriving and leaving, or a person worn down by carrying it. A rooted Day Master with output stars feeding a modest Wealth star was often judged the sounder position. The count is only a starting point; the capacity to carry it is the real question.
The day branch is treated as the spouse seat in Bazi. Classical manuals generally read Regular Wealth sitting there in a man's chart as a capable or supportive partner, or as material benefit arriving through marriage, and count it among the more favoured placements. It remains one symbolic signal from one position, so traditional method still checks whether that branch is clashed or punished, whether the Day Master is strong enough to carry the Wealth, and whether Wealth stars are repeated elsewhere. Women's charts have their own history here. Older manuals organised a woman's chart around the Officer stars as the spouse indicator, so Wealth tended to be read as household competence, in-law relations, or the source that feeds the Officer star, a framing that carries the assumptions of its period. The reading more common today treats Wealth in a woman's chart exactly as in a man's, as her own earning and money-handling capacity. Under either approach, traditional method would not judge a chart on the Wealth star alone.
The month branch decides it. If the hidden stems of the birth month include the Day Master's Regular Wealth, and that Wealth also surfaces in a heavenly stem without being clashed away, the chart is traditionally classed as a Regular Wealth structure, income pursued along conventional routes. The structure is said to welcome an Officer star guarding the Wealth and output stars generating it, and to dislike Companion stars competing for it. Wealth scattered outside the month branch is read as a preference rather than a structure.