Yang Blade

Yang Blade is commonly discussed alongside concentrated same-element rooting for yang stems, with imagery of force that may need expression or regulation. It often shares a branch with Rob Wealth but is not synonymous: Rob Wealth is a stem relationship, Blade a lookup, and a Blade pattern an additional month-based classification.

A common Zi Ping table assigns Jia–Mao, Bing/Wu–Wu, Geng–You and Ren–Zi. San Ming Tong Hui records both a branch-after-Lu formulation and a Zi Ping approach assigning Blades only to yang stems. Tables differ in their handling of yin stems, so identify the convention.

For Jia, Mao receives a Yang Blade marker under the yang-stem table. Yi hidden in Mao is also Rob Wealth. One is a lookup marker, the other a Ten God relationship. A month-based Yang Blade pattern additionally requires checking the Month Branch and pattern-selection rules.

In a constructed Jia chart born in Mao month, Mao is Blade, hidden Yi is Rob Wealth, and the season strengthens wood. Geng Killings introduces a control relationship; Fire Output introduces a route for expression. These are different ways the concentrated wood may connect.

If Mao appears only in the Hour Pillar, the Blade lookup still applies but does not establish a month-based Blade pattern. Separate lookup, placement and pattern selection when explaining why two Blade-marked charts differ.