But spoken Chinese is quite different from written Chinese, which allows for more economy. Often a single character will be used in writing where a two-character word would be used in speech. And people's names usually can't be determined by the pronunciation; they are defined by the actual characters. If Chinese moved to a strictly phonetic writing system, a lot of culture would have to adapt: conventions around signage, poetry, proverbs, names (this is a big one!) of people and organizations, formal writing, wordplay, etc.