Modern versions of the Chinese language have two kinds of punctuation marks for indicating proper nouns – the proper name mark[1] / proper noun mark[2] (Simplified Chinese: 专名号; Traditional Chinese: 專名號) and book title marks[3] / title marks[4] (Simplified Chinese: 书名号; Traditional Chinese: 書名號). The former may be applied to all proper nouns except when the nouns in question are titles of textual or artistic works, in which case the latter are used instead. Unlike the proper name mark, there are several variants of book title marks.
This style uses two different underlines. The proper name mark appears as a straight underline (＿), while the book title mark appears as a wavy underline (﹏).
屈原放逐，乃賦離騒。左丘失明，厥有國語。
Translation: Qu Yuan was exiled, the Li Sao was thus composed. Zuo Qiu (or Zuoqiu[note 1]) lost his sight, hence there is the Guo Yu.
In this case, on-the-left beside-lines (︳) and (︴) are used instead of underlines.
When a proper noun immediately follows another, the lines accompanying each of them do not connect; however, many digital systems are unable to correctly display this break.
The use of this style is common only in Traditional Chinese school textbooks as well as Classical Chinese text that has been re-laid out in a modern style.
This style only uses a pair of guillemets (《⋯》) and a pair of angle brackets (〈⋯〉) as book title marks, which are intended to surround the title of a piece of textual or artistic work. However, no punctuation marks are used for other proper nouns.
In this case, the rotated forms of the above-mentioned symbols (︽⋯︾) and (︿⋯﹀) are used instead.
Since these symbols are processed as individual characters, there are virtually no difficulties for digital systems to display them correctly.
These styles are dominant amongst both printed and digital Chinese text. In Taiwan's Traditional Chinese, the choice between guillemets and angle brackets is made according to the format of the textual or artistic work – in general, guillemets are for those that would be italicized if they were in English text, whereas angle brackets are for those that would be in quotations if they were in English text. In Mainland China's Simplified Chinese, guillemets are used regardless of the work's type – angle brackets only appear between them to indicate a title within another title. Outside of Hong Kong and Macao, whose governments have adopted the Mainland Chinese standard on the usage of all punctuation marks (even when Traditional Chinese are used), the Taiwan standard is widely adopted.