Method 1, 3 to 5 years, if nothing happens, it will be safe.
Method 2: Bring a big dog into the house before check-in and observe its reaction within half an hour. If it doesn't bark, it's basically fine.
If you scream in a certain direction, please ask the master to have a look.
Method 3: If you need to move in urgently, choose an auspicious day and then move in. Don't hedge the owner's zodiac sign, and do all the check-in procedures well, such as worshiping the four corners and moving the golden bricks. Specific can ask the old people, in general. If you don't understand, ask the owner of the candle shop directly.
Method 4: If everything goes wrong after living for a period of time, it may be a feng shui problem at home. Rearranging furniture helps to improve the owner's fortune.