Advanced 8 Mansions System
Beyond the fundamental of 8 mansions system. There is this principle of 納甲 (Najia) to fine tune the 8 mansions methods of Fengshui.
The principle of Najia suggest alternate positive directions to harness the positive effects of Qi.
坎纳癸，( 申，子，辰 )
离纳壬，( 寅，午，戌 )
兑纳丁，( 巳，酉，丑 )