Practicing calligraphy requires the basic tools of “four t_________(1) of study” as well as much c____________(2) in guiding the soft writing brush charged with fluid ink and writing on the paper where the ink will d_________(3) quickly. Once the brush movement h_________(4) , a black mark is created, so s_______(5) , strength and a_________(6) is the essence of fine artwork. When writing, many calligraphers will forget all worries and even themselves, combining all thoughts in the b_________(7) of their art. Just as the name implies, the regular script features its regularity and varies from the flat f_______(8) to a square one. It is today’s most popular and i________(9) writing style. The period when regular script t_______(10) must was the Tang Dynasty, hen Yan Zhenqing and Liu Gongquan successively established schools of their own styles.