The north wind in the twelfth lunar month is like quenched ice, and it can hurt the bones when it blows on your face. Fan Huainan wrapped her navy blue woolen coat tightly and held the roasted chestnuts she had just bought in her hand. The paper bag was softened by the heat. The warm aroma mixed with the sweetness of roasted sweet potatoes on the street barely dispelled a bit of the chill. The wooden door of the old teahouse is still the same as before. The vermilion paint peels off badly. The two official script characters "Tingtao" on the lintel have been worn away by wind and rain. When the door is opened, there is a "squeak" sound, which seems to have penetrated more than ten years of time, dragging people back to the old days.