China holds a <a href="https://en.wikipedia.org/wiki/National_day_of_mourning" id="mwAbg" rel="mw:WikiLink" title="National day of mourning">national day of mourning</a> for martyrs who died in the fight against the <a href="https://en.wikipedia.org/wiki/COVID-19_pandemic_in_mainland_China" id="mwAbk" rel="mw:WikiLink" title="COVID-19 pandemic in mainland China">novel coronavirus disease outbreak</a>.