Customs of Han nationality in Jiangnan. Every long summer, people eat boiled eggs or salted duck eggs, thinking that eating eggs in long summer can keep fit. Long summer egg [1] is the most classic food in long summer that day. The day before long summer, long summer cooks eggs at home, usually tea or walnut shells, and the eggshells turn red slowly, making the house delicious. Eat the tea eggs while they are hot. When eating, you should pour good Shao wine and sprinkle some fine salt. The wine is fragrant.