According to Sohu. Com, 1.0 pen can be used for the signature of hard pen calligraphy test, and 1.0 pen tip is easier to draw, and it is easier to control the line thickness of strokes, so it will not be stiff and procrastinating.

Hard-pen calligraphy test refers to the test organized by the examination institution to evaluate the basic skills of China's hard-pen calligraphy.