To foster optimal Chi flow and create a harmonious living space, place your 160x200cm bed with its headboard against a solid wall, specifically the right-hand wall when entering, providing a commanding view of the door without direct alignment. Position the desk in the opposite corner, against the left-hand wall, also ensuring a clear view of the room's entrance to empower focus and productivity. The sofa should be placed along the wall with the two windows, inviting natural light and creating a bright, welcoming relaxation zone. For the old oven, if it cannot be removed, consider covering it with an attractive screen or placing a robust plant nearby to transmute any stagnant energy, while integrating the cloth storage and bookshelf along the left-hand wall to maintain clear pathways and support structure. Incorporate soft, earthy tones like sage green or muted blue for walls and textiles to promote calm, balanced with natural wood elements and touches of metal for clarity, ensuring a gentle and balanced energy throughout the 20 sqm room.