As a matter of fact, the situation of Chinese punctuation marks is a mess. Until now we do not have independant symbols for Chinese dashes, ellipsis, interpunct in Unicode.
In practice, we use three kinds of dashes in Chinese: one is halfwidth, corresponding to the Latin hyphen symbol; one is one-character-width, corresponding to the Latin en dash symbol; one is two-character-width, corresponding to the Latin em dash. The Chinese now always treat U+2013(en dash) or U+002D(hyphen-minus) as the halfwidth dash, and assign U+2014(em dash) as their one-character-width dash, and for the two-character-width dash, they just enter two em dashes. However, it is just a compromise, since these dashes and hyphen were always designed for Latin characters typesetting, the horizontal line does not sit in the middle height of a Hanzi character. And for some typefaces, two continual em dashes come out a long horizontal line but a break in the middle, which is not consistent with the appearance of a two-character-width dash. Chinese don't have a two-character-width ellipsis(six dots) either. Actually, we can generate a two-character-width ellipsis with two continual one-character-ellipsis(three dots) which is well designed for the position of each dot. But now Chinese use a ugly hack—they just type two continual '…'(HORIZONTAL ELLIPSIS, U+2026). As the case of dashes, the dots do not lie in the middle height of a Hanzi character. Some people will choose the mathematical operator '⋯'(MIDLINE HORIZONTAL ELLIPSIS, U+22EF) as a substitute, but a lot of Chinese fonts don't support such a symbol, and most of all, it is a mathematical operator, not punctuation mark!! For interpunct, we need a solid dot which sits in both vertical and horizontal center of the character box. Actually the Katakana symbol '・'(KATAKANA MIDDLE DOT, U+30FB) is a good implement for Chinese interpunct, but as the name reveals, it is just a Katakana symbol, not a common punctuation mark for East Asian characters. So should we submit a proposal for these Chinese punctuation?