What font is horizontal fine vertical thick?

In this case, the fonts are Song Ti and Kai Ti.

When designing and writing, Songti and regular script both follow the characteristics of horizontal fine and vertical thick. As a printing font, in order to meet the requirements of printing technology, the horizontal line part is designed to be thinner, while the vertical line part is thicker. Improve printing efficiency and quality while maintaining readability.

In the process of writing, in order to pursue the charm and beauty of calligraphy, regular script characters are also written horizontally and carefully. Make regular script more stable and solemn, giving people a feeling of ancient simplicity and elegance.