(2) Don't put the desk on the right side of the door: the desk and the door are inclined. In Feng Shui, you will violate the taboo of facing the door from left to right.
(3) Avoid placing the desk under or behind the window. This situation is equivalent to putting the desk in suffocating air, often being peeked by pedestrians, and so on.
(4) Avoid the desk being located under the beam: This situation is called "the top of the beam" when the desk is placed in Feng Shui, which brings bad atmosphere and affects people's health.