The top-right Preview | Markdown editor leaves ** and * literal when CJK punctuation sits against the markers. The classic side preview uses markdown-it, so an extension can fix it through markdown.markdownItPlugins (markdown-it-cjk-friendly). Native Preview is a separate renderer and ignores that extension. There is no setting or extension point for it.
**该星号不会被识别，而是直接显示。**这是因为它没有被识别为强调符号。
此处**强调（标记）**紧接汉字。
Expected: both spans, including the punctuation, render as bold. Actual: the asterisks stay visible.
This is CommonMark issue 650. The flanking rule, and a spec that stays identical to CommonMark for non-CJK input, is in tats-u/markdown-cjk-friendly. Please use that rule in the native Preview parser. An extension hook equivalent to markdown.markdownItPlugins would also let us fix it ourselves.