The living room is too long and the door is in the middle, the window is 3 meters wide and 7 meters

Without a floor plan, it's hard to help you analyze. As far as your description goes, I hope it can help you.

Splitting can directly solve the problem, such as partitions, screens or entrances. If you don't like these fixes, you can also choose the flexible way and move them later. Method:

The sofa in the sitting area is L-shaped. It is a group of three, a group of two or a single, or simply put two distinctive chairs, but when placed, the enclosed space is deliberately elongated, and then on the long side, a sofa back table is placed behind the sofa (there are many styles of this kind of furniture, there are European-style back tables, as well as Chinese-style strips, which can be chosen independently) And some handicrafts can be placed on the back table to enhance the artistic taste of the space. This not only divides the areas of the space, but also makes the space more layered.

Or according to the actual floor plan, plan an open kitchen or restaurant, or a leisure corner, or a bar, or a reading corner, etc., there is too much room for change.

It's better to look at the top of a model, but the price is high.