The land left by grandpa was occupied by my dad's brother and joined the gang. Will this affect us? Will Feng Shui luck affect us?

Don't worry, it won't affect you, because it is reasonable to say that no one will affect your family, because it is a house handed down from your family. Don't take it to heart, because it is occupied by your parents and brothers. Wealth will not suffer any losses. If the house itself has feng shui problems, it will also affect your parents' and brothers' homes. I won't contact you in any way. Because your family is separated from theirs. it doesn't matter