In Flying Star ZWDS school of thoughts, there are many points that are not readily addressed with regard to how “clashes” can happen. On many accounts, the general notion is that if Palace A sends forth a Hua Ji to Palace B, it will clash in opposition to Palace C. This is a wrong notion because not every “clash” can happen. Sometimes, the Hua Ji will just “enter” into Palace B without anything happening to Palace C.
* Note: In The Empyrean Matrix, the usage of Clash in my San He style is very different from the Flying Star Clashes. Since only one Hua Ji appears in the San He styled Birth Chart and up to three Hua Ji in Current Year Chart, and not potentially flown from the 12 Palaces, clashes happen directly in correspondence to Hua Ji in opposition.
So the conventional and popular school of thoughts is that if the Hua Ji enters Palace B that belongs to the “Internal Palace” (or my Palace), clashes will not happen. The conundrum of many Flying Star schools is the many proposition of what constitutes “Internal Palace” or “External Palace”. One school of thought is that quite “literally” the Internal Palace consists of Life, Wealth, Career, Siblings, Property and Health, whereas everything else is External Palaces. Whereas there are also other school of thought that refers to Internal Palace as Life, Wealth, Career, Fortune, Property and Health. Both are inferred from the He Tu/Luo Shu numerations (1-6 relationships for example) although differently.
After much research, the best explanation of Internal Palaces will consists of San Fang of Life Palace (constituting Life, Wealth, Career) and also of San Fang of Property Palace (constituting of Property, Siblings and Health), and everything else is considered as External Palaces. Does it mean that the first school of thought that I mentioned is correct? It is only half correct. If you set TaiJi at say for example Siblings Palace, the San Fang of Siblings Palace as the “Life Palace” (Siblings, Property, Health) and San Fang of “Property Palace” of Siblings Palace which is the Fortune Palace (Fortune, Spouse, Travel), the Internal Palaces pertaining to Siblings will be as above. This means that status of Internal and External Palaces are dynamic during Interpalatial Dynamics.
The common belief is that “clashes” must always take place if Hua Ji enters the opposite sides of the standard Internal Palaces like Life, Wealth, Career, Property, Siblings and Health. This is actually a fallacy. Does it mean that palaces like Children, Parents, Fortune, etc are not clashed because they don’t fall within the range of Internal Palaces? That is what most people think! This is true only on the basic natal Birth chart level. The real answer lies in that Palace B belongs to “External Palace” in opposition to the affected palace and that this is subjected to Interpalatial Dynamics. Now, isn’t all External Palaces opposite to Internal Palaces? When a practitioner get into periodic charts, and with the emphasis of inferences between Subject and Object, palaces like Children, Parents, Spouse, etc can still be clashed, especially at the primary level (e.g. Birth Chart, by the Decade Period Chart). Yet it doesnt mean every palaces can be clashed. What happens is that the “External Palace” of Palace B should be taken into account of its new position in the periodic charts. An example: Decade Life (Birth Friends) sends Hua Ji to Decade Spouse (Birth Property) clash Birth Children.