Saying goodbye to the sea is more professional. Cihai is the largest comprehensive dictionary in China. Cihai is a large comprehensive dictionary with words, which has the functions of dictionary, Chinese dictionary and encyclopedia. The word "Ci Hai" originated from the famous Han Dynasty stone carving "Ode to Shimen" in Hanzhong, Shaanxi. The emperor's masterpiece Ci Hai is the crystallization of a century and several generations of scholars. The earliest planning launch of Ci Hai began at 19 15. At that time, Mr. Lu Feikui, the founder of Zhonghua Book Company, was determined to compile a comprehensive dictionary integrating China's words, phrases and encyclopedias, and its momentum was admirable. It also takes the meaning of "all rivers run into the sea" and is entitled "Ci Hai".