Nourishing porcelain opening is to use high temperature tea soup, so that the cup opening part of the instant contraction into the glaze cracks, therefore, a long time with tea soup soaking cup is not advisable, because this will let the tea stain deep open around, this feeling and the effect is similar, the whole tea machine looks dirty.
Whether the cup or the pot is soaked in tea for up to 4 hours a day, if you feel that the tea is soaked for a long time in a day, then immediately take warm water and wipe it with a dry cloth.