The golden lock and jade pass are harmful to people.
The only place where Jinsuo Yuguan can be used is on some iron openings. It has no effect at all on actually dealing with Feng Shui issues, because it has been separated from the scope of Yin and Yang.
To learn Feng Shui, you can read more academic books, but you cannot be blinded by academics. The answers are for reference only, please do not be blindly superstitious.