零正即陰陽，實為對待而已。陰陽零正是方位在不同元運上之運用，在何元運中以何方位作吉作凶之學理。零正分正神與零神，另又分照神及吉照。以當元之令神為正神，即旺神，與正神對時合十者為零神，即出元之衰神。
 

如三運，元旦盤中之三碧居位為正神，對待之七赤為零神。

先天河圖一二三四之生數為上元四山之正神，六七八九之成數為上元四水之零神。反之，下元以六七八九之成數為四山之正神，一二三四之生數為四水之零神。

正神零神之運用，正神要見高山實地，零神要見低漥有水，所謂正神正位裝，撥水入零堂。

例<九運，零神正神之方位>

因五運八宮寄旺於四維土，故取裁跟各運有所不同。

例：<五運>

前十年寄坤，艮為零神，巽為正神。

例：<五運>

後十年寄艮，坤為零神，乾為正神。

吉照及照神一至九運之方位排法，以水之宮位河圖數合生成者為照神，其餘水之宮位除了零神、照神外，便屬吉照了。而水之宮位為上元運以六七八九為水之宮位，下元運以一二三四為水之宮位。

因五運八宮寄旺於四維土，故取裁跟各運有所不同。

例：五運 <前十年以午丁為照神>

例：五運 <後十年以子癸為照神>

總之陰陽零正是以作排山水之用，方位元運之配置，以零神居首，照神為次，吉照為末，得水者吉。其中當要求配以當時得令之飛星，飛星能配以方位，其力愈加雄厚，反之，如果與零正方位相違背，縱得旺山旺向亦為遜色也。

一句「正神正位裝，撥水入零堂。」引出了玄空陰陽零正的學問，風水是方位術，陰陽零正更是方位術中的方位術。

陰陽零正其學理深淵，我可去繁從簡地說，我們要在下元八運時期，坤上三山見水，艮上三山見山，星盤上的向八要在坤，山八要在艮，這便基本上合正神零神之配置，反之，則為不配，又若然其中一合一不合，如坤宮外之形巒見水，且向八居坤，艮宮外之形巒見山，但山八不在艮，此為之不配。不配者，其丁財兩運不會因陰陽零正而有所增加，而其到底失運或得運，可從其他方面去斷。

然活在八運，居八運盤之樓房，其陰陽零正之力才顯，故此，居六運樓、七運樓，甚或五運樓，其若然坤八見水，仍不可以跟八運的坤八見水來比，相差得何其十萬八千里。例如六、七運香港的「美孚」，與「西九」2004-2023建的新樓宇比，假若大家都坤八見水，我曾勘察此兩伙，居內之人，運勢確有天壤之別，一伙人旺另一伙人則平平矣。

坤上見水及艮上見山，仍需以一卦清純合，如地元龍之宅命，便要在未、丑、如天元龍之宅命，便要在坤、艮，如人元龍之宅命，便要在申、寅，要這樣才合清純之要求，力度才大。但學者會問，假若坤上外巒三山都見水，艮上外巒三山都見山，又是否合局？玄空之法，力大力小之比較而已，三山中要細認其蹤，看看有否力量之聚結便可，如艮上三山都是山，則清純之位便要為最高峰是也。

簡述之便很簡單，但實際應用時，又是另外一回事。如實盤得局，又究竟是否住入即可發？有此陰陽零正地運得旺的幫助，能覓得且住入，當然不錯，這時便猶如入寶山要去開採一樣，是要懂得佈局搶平洋大氣的運，財丁才旺，然因現今陽宅多是多層式結構，你有零堂樓上樓下人家亦有，到時看看你是否懂得「撥水」而已。

Yin-Yang Ling Zheng

Ying Yang Ling Zheng provides a principle for auspicious positioning of a house with reference to the direction of mountain and water in the external environment in different Periods.

The Zheng position and Ling position are generally in a direction opposite to each other. The Zheng position is referred to as the Yang-favouring or mountain-favouring direction, while the Ling position is referred to as the Yin-favouring or water-favouring direction. It is auspicious if a house can have high land or mountain located in its Zheng direction and, at the same time has low land or water in the Ling direction.

The location for Zheng and Ling positions vary in different Periods. The Zheng position of a Period is the direction indicated by the palace in the Luo Shu Chart that has the Period numeral. Diagonally opposite to it is the Ling position. For example, the Zheng position of Period 3 is in the Zhen palace where the numeral 3 resides in the Luo Shu Chart. It represents the east direction, so it is auspicious to have a mountain in the east of a house. The Ling position is then in the Dui palace which is the palace in Luo Shu Chart opposite to the Zheng position. Here is where the numeral 7 resides, and it is good to have water in the west of the house.  

The location of Zheng and Ling positions in different Periods are shown in the table below. The numerals in the Zheng and Ling positions in the table are the numerals in the Luo Shu Chart.

As numeral 5 is located at the centre of the Luo Shu Chart, the determination for the Zheng and Ling positions of Period 5 is different from the others. In the first 10 years of Period 5, it abandons itself to the Kun sector. The Zheng position is located at the Sun palace and the Ling position is at the Gen palace. In the second 10 years of Period 5, it abandons itself to the Gen sector. The Zheng position is at the Qian palace and the Ling position is at the Kun palace. 

Apart from the Ling position, there are also other water-favouring directions: the Shining (Zhao) position and the Secondary Ling (Ji Zhao) positions. However, these are of secondary importance in determining auspiciousness. In general, the locations of the water-favouring direction in various Periods are reflected by the initiating and concluding numbers in the Former Heaven River Chart. The overall water-favouring directions in the Periods 1 to 4 are located at palaces resided by 6, 7, 8, and 9, while those in Periods 6 to 9 are located at palaces resided by 1, 2, 3, and 4.  

The Shining (Zhao) position of a period is indicated by the palace that has the numeral that would combine with the numeral of the Zheng position in Luo Shu Chart. Other than the Ling Position and the Shining (Zhao) position, the rest of the water-favouring positions are referred to as the Secondary Ling positions.

As Period 5 abandons itself to the inter-cardinal positions of the eight palaces, the determination for the Shining position and Secondary Ling positions is different. In the first 10 years of Period 5, the Shining position is at the direction of Wu and Ding Mountains, and that in the second 10 years is at the direction of Ji and Gui Mountains.

Apart from Yin Yang Ling Zheng, it is also important for the positions of the timely Stars to match with the physical formation of the external environment. If both the Yin Yang Ling Zheng and the timely Stars can match well with the mountain and water formation, auspiciousness of a greater extent can be achieved.