In ancient times, it was Feng Shui that moved the grave into the house, so Mr. Feng Shui should be Mr. Feng Shui. Personal estimate.
As for Tan Yang, there is no Baidu, which means that there is a gentleman who looks at Feng Shui named Tan Yang. It should be like this. According to his information, no geographer or geographer was the earliest geomantic official in ancient China. That is to say, there should have been officials specializing in this at that time, equivalent to priests ~ ~
I think it's all the same.