Bai-si bing tu pei se

Quick answer：

The 'Bai-si bing tu pei se' refers to the color scheme used in a bingtu, which is a traditional Chinese statistical graphic. Bingtus, also known as 'dot plots' or 'dot diagrams,' are used to represent multivariate data. Each variable in the data is represented by a series of dots plotted along a common scale. The color scheme is crucial for distinguishing different variables and their values in the plot. The specific colors and their meanings can vary based on the designer's preference or the context of the data.