Office chair, geomantic omen, seat back facing the door, window facing west. How to change Feng Shui?

I probably know that the seats in the office are not easy to adjust. Since they can't be adjusted, I suggest.

1. Put a tall and rich tree behind the office seat as a backer to solve the problem of no backer.

2, through the tree as a barrier, cut off the airflow between doors and windows, and resolve the unfavorable feng shui.

3. If it doesn't work, hanging earth clothes behind your position can solve it more or less.