Ducher people
... that the erstwhile capital of the Qing Heilongjiang was built on the site of a town formerly belonging to the Ducher people, whose ethnic identification remains controversial?
... that the <a href="./Aigun" id="mwCcI" rel="mw:WikiLink" title="Aigun">erstwhile capital</a> of the <a class="mw-redirect" href="./Qing_Dynasty" id="mwCcM" rel="mw:WikiLink" title="Qing Dynasty">Qing</a> <a href="./Heilongjiang" id="mwCcQ" rel="mw:WikiLink" title="Heilongjiang">Heilongjiang</a> was built on the site of a town formerly belonging to the <b id="mwCcU"><a href="./Duchers" id="mwCcY" rel="mw:WikiLink" title="Duchers">Ducher people</a></b>, whose ethnic identification remains controversial?