Why do Chinese paintings often use blank spaces?

What you said is more or less in the flower-and-bird painting, which can leave imagination space for the viewer and increase the level and density of the picture. You can decide the composition of the whole picture and the placement of the center of gravity. The clarity of water can also be shown in the paintings of insects and fish. If it is a landscape painting, it can show lofty or quiet spatial artistic conception, but it will not be too big compared with the whole.