The Regular Script or standard script, or in Chinese kaishu (simplified Chinese: 楷书; traditional Chinese: 楷書; pinyin: kǎishū) and Japanese kaisho, also commonly known as standard regular (正楷), is the newest of the Chinese calligraphy styles (appearing by the Cao Wei dynasty ca. 200 CE and maturing stylistically around the 7th century), hence most common in modern writings and publications (after the non-calligraphic printing Song Ti). It is also occasionally known as true script (真書 zhēnshū) and standard script (正書 zhèngshū).