This is part of Wang Euzhi's poetry theory, which is "one meaning". The detailed explanation is as follows:
The so-called "one meaning" refers to the refinement, purity and concentration of poetic meaning. In order to achieve this standard, Wang Fuzhi believed that poetry creation should be concise in selecting materials, that is, it should focus on describing one emotion, one event, one object, one scene, one time, one place, etc.