Yin Zhai or Burial Feng Shui is one of them most intriguing part of Feng Shui since all Feng Shui studies originate from here.
The most famous classic book of all times is the Book of Burial by Master Guo Pu of the Jin Dynasty.
The study of Yin Feng Shui is extensive but primarily is the study of land forms but all these study of land forms in the end is to explain 2 words and that is Feng Shui. Then from here the application portion has seen many schools practicing differently. There are masters from the San He school, San Yuan school and even masters using 8 Mansion and Bazi Feng Shui method to bury the deceased. Some even use symbolic method like building a lion on the grave. All of them emphasize different aspects of burial.
Example, how & where they place the Guardian God (后土) is different between San He and San Yuan schools.
It is in the Chinese culture as well in the practice of Feng Shui that if you bury the deceased in the right location and direction, the descendants can proper to have riches and power. If bury on the wrong land, accidents, poor health and jail terms can happen to the descendants How true is it, to many folks remains a mystery but to those who have witness it’s results understands how it works.
I had the privilege to follow Master Francis Leyau in one of the recent class on Yin Zhai (April 2013) and undoubtedly there are many knowledge one must possess to be able to obtain the result of the burial. From land selection, finding the dragon, the neck, the head & the lair (穴) is indeed not easy. Just erecting the head stone alone, there are so many factors to take care and look into it.
It was interesting when Master Leyau explains how and why ancient Chinese built graves in this way as opposed to modern graves as shown on the photo on the right side which is square. There is a meaning based on the study of Feng Shui why round graves are preferred.

Here are some photos from the trip:

The Journey of Feng Shui is indeed like a journey of 1000 miles but if you find the right master you can cut your journey by half but you still have to walk 100 miles first to find the master. This is just a metaphor based on my experience. Feng shui is a subject that you need a real Master to guide and show you how to tie what is written in the Classics to actual practical. Only a master who has walked the distance can show you the right from wrong.
I considered my self lucky in this sense to have met and learnt from Master Leyau. I have seen so many people that have given up Feng shui because they have not been able to learnt the correct method and hence either did not get the results or half the time works and the other half don’t. Some after learning 10 years had to get other services to correct their Feng shui after their business failed. Isn’t it sad that they cannot even get their Feng Shui correct after spending all the years and money learning from their masters ?
This problem primarily comes from 2 major sources. One either the master is too young and had not done enough audits and practical work or they themselves read from the books or so called self studied masters. You can buy plenty of books cheaply in Hong Kong and Taiwan if you could read Chinese. The worst author are those who reads many books and compile them into a 3rd books. The source of knowledge is completely untraceable. This is very dangerous since they cannot tell what is right from wrong, they just assumed that their understanding of the classic is correct.