Green cucumbers are not yet ripe, but when they are ripe and the stems fall off, they will turn yellow.

Cucumber was brought back to the Central Plains by Zhang Qian on his mission to the Western Regions during the Western Han Dynasty. It was called courgette. During the Five Hus and Sixteenth Kingdom, Shi Le tabooed the word "Hu" and changed it to "cucumber".

Correct answer, "Ma Weidu Talks about Furniture": "In fact, as early as the Sui Dynasty, the name of Hu Bed changed. "Zhenguan Zhengyi" has such a record, Emperor Taizong of the Tang Dynasty said: "The nature of Emperor Yang of the Sui Dynasty" He is fond of guessing and guarding, believes in evil ways, and is very taboo with barbarians. He even calls the beard bed a cross-bed and a courgette a cucumber, and builds the Great Wall to avoid beauties. "Emperor Yang of the Sui Dynasty was of Xianbei descent, but he was particularly taboo on the Hu people. He ordered the Hu Bed to be renamed. Because the Hu Bed's legs were crossed, it was changed to "Jiao Bed". At the same time, Emperor Yang of the Sui Dynasty also changed the names of many other items. For example, the cucumber we eat was originally called courgette, broad beans were originally called walnuts, sheep were originally called walnuts, and walnuts were originally called walnuts, etc. ”