xiě / zì / zhī / qián / yào / xiān / mó / mò / mó / chū / de / mò / zhī / cái / nóng / dàn / shì / zhōng

写字之前要先磨墨，磨出的墨汁才浓淡适中。

Before writing, you should grind the ink first so that the ink liquid has the right consistency.