Hi Yangfl, Gianfranco, As previously explained by Yangfl, files in /usr/share/dman/ are richtext manuals intended to be read by deepin-manual (which is not in Debian Archive yet).
"Dman" manual files contain some images, which made lintian aware that this is an arch-dep package with large arch-indep files. Splitting the package into "deepin-voice-recorder" and "deepin-voice-recorder-doc" might be an option. We could choose to remove all files under /usr/share/dman/ too. A third option is to keep everything intact since they do not harm at all. Personally I think all three approaches are acceptable. -- Regards, Boyuan Yang