Before the porcelain is fired, the blue pattern painted on the blank is covered with a layer of transparent glaze. After high temperature, the warm and deep color appears. The stories in this collection are like those "underglaze blue" - all the love is painted quietly, unobtrusively, not dazzling, but slowly becoming clearer with the temperature day after day. There are several short stories, and the sweetness is the kind of quiet sweetness.