Is calligraphy a brush or a hard pen in the 26th Primary and Secondary School Calligraphy and Painting Competition?

Brush or hard pen will do.

Because the notice of the 26th primary and secondary school students' calligraphy and painting contest has already stated that both soft and hard pens can be used for calligraphy works. The original soft pen calligraphy works shall not be more than four feet apart. Hard-pen calligraphy works should use working paper, the size should not be less than A4, and the number of words should not be less than 30 words.