In 2020, with the advent of 5G, it seems that all content, all industries are imperceptible, but there are real changes, it is not too much to call this the second coming of the Internet, in this context, there's also been a slight change in our most common input method. Speaking of the huayu input method, perhaps young friends do not know, this is a very distant name, as early as 20 years ago in 1999, Huayu Pinyin input method first entered the public arena, the predecessor was the "Koala input method" written by Dr. Li Guohua, after the experience of "Ziguang Huayu Pinyin input method" , "huayu pinyin input method" name change. I remember two things, the first is: 2014 Hanyu Pinyin input method official open source, core source hosted by GITHUB, developers can download and compile their own. Open source is to give fans infinite possibilities, but perhaps because there is no official strength and professionalism, huayu has been low-key no one mentioned. The second is: In an early question in Zhihu, Sogou CEO Wang Xiaochuan personally answered and explained the reasons for the decline of the huayu input method. Since then, he has learned about the huayu input method, and when he worked for a state-owned enterprise, since there was no internet, I wanted to try an 'intelligent input method' that didn't require a connection to the Internet. I tried it myself and used it for nearly a year, and I got a better idea of the first darling of this input method.