On this day, 138 years ago, July 26, 1887 (June 6, 1887 in the lunar calendar), Esperanto was founded. Esperanto is an artificial international auxiliary language. Created by Polish doctor L.L. Zamenhof on July 26, 1887. Based on several major languages in the Indo-language family, improvements have been made in pronunciation, vocabulary, and grammar. 28 phonemes are set up and correspondingly represented by 28 letters. The pronunciation and spelling are completely regular, making it easier to learn and master. There are now more than 10 million people around the world who understand Esperanto. Comment: It has added an effective channel for human communication. May one day people all over the world master Esperanto.