What pen was used to write the scarlet letter on the gourd?

Write the scarlet letter on the gourd with a wolf pen. Gourd is a blessing, and gourd is an auspicious plant. Try to choose a wolf brush when painting gourds. Painting, which has existed in China since ancient times, is called Danqing. Decorative paintings commonly used in traditional buildings in China. Later, it spread to the Korean peninsula and Japan. And it is widely used and carried forward by both.