Article
舊草帽洗新法 - A Way to Clean Old Straw Hats

Column title: 常識 - Common Knowledge
Subject matters: 新知 - new knowledge,
Language level: Baihua

Keywords: general knowledge,

---

Article
不宜讀書幾點 - times when it is not advisable to study

Column title: 常識 - Common Knowledge
Subject matters: 新知 - new knowledge,
Language level: Baihua

Keywords: general knowledge,

---