As shown in the figure: First of all, you don't have a special dining room. According to the proportion of your living room, the dining room can only be placed in the lower left corner, and there should be a partition between the dining room and the sofa. Judging from the size of the floor plan, there is no room for your partition. Secondly, the width of your TV wall is 3111, and the total length of the sofa is not recommended to exceed 3611. The size of the L-shaped sofa is basically as shown in the figure. From the first picture, if you add a single seat (the depth of the single seat sofa is about 881~981), the coffee table cannot be centered. Judging from the second picture, an L-shaped sofa with a single seat can barely be put down. But as mentioned before, there is no room for partition between the dining room and the sofa, so it is suggested to use the princess of the sofa to separate the dining room. At the same time, from the perspective of geomantic omen, the two opposite corners of the entrance door are financial positions (the left door is open, that is, the right corner is the main financial position, and the right door is open, that is, the left corner is the main financial position), and leafy plants should be enlarged in the financial position. Therefore, if you talk about Feng Shui, it is suggested to arrange it according to the first picture. If it doesn't matter about Feng Shui, and you have to add a single seat, please refer to the second picture. ; In addition, the size from the TV wall to the wall behind the sofa is only 3611, so the TV cabinet and coffee table can't be bought too big, otherwise it is not convenient to cross the road.