What kind of writing brush is used for the second level of writing grade examination?

There are three kinds of medium-sized pens for the writing level test: small, medium and large. According to relevant public information, a double-stranded brush, a medium-sized wool, is generally used in calligraphy practice. Because wolf hair and wool are soft, they are not suitable for novices, while Yang is moderately soft and hard, which is more suitable for novices to write regular script. In the second-level brush test, the students who choose to use the intermediate Yanghao brush are the sixth and ninth grade students and professional calligraphers who take part in the grade test. Double brushes can be bought and used in the Shanghai Calligraphy Grade Examination. You can choose to use double brushes in Shanghai Calligraphy Proficiency Test and any other calligraphy proficiency test. Double double brush means that the outside of the brush is wool and the inside of the brush is wolf hair.