Summary
The character system is inherently difficult. Zhou identifies, what he calls, the "four difficulties:" complicated stroke patterns, large number of characters, chaotic pronunciation, and understanding the meaning is difficult. To counter these he shows how these difficulties have been managed in the past by listing four stabilizing features that have remedied these problems: stabilize the shapes, stabilize the amount, stabilize pronunciation, and stabilize the sequence.
Stabilizing the shape deals with the number of strokes that it takes to write a character, many characters have been written in many variant forms, depending on the time period and the script at use during that time. This is often done naturally as the script is written more often by more people. After the Qin reunification the seal script became too inconvenient to be written quickly so the clerical script was created. The clerical script drastically reduced the number of strokes to write characters and also standardized the strokes used. Later as the clerical script was used more and more, it merged with the semi-cursive script to create the standard script. This trend has continued to the present, with many of the common abbreviations of characters have become the official characters in public use. Zhou argues against the popular theory that character scripts get more and more complicated as time progressing by explaining the difference between "compounding" and "complexity." Most characters are compounds of simpler distinguishable features,which to the untrained eye have the appearance of complexity, but in reality go to distinguish important phonetic and semantic qualities. Another way that the shape has been simplified was through "assimilation." Assimilation, if done correctly, can reduce component parts without creating vagueness. An example of this is using the 月 which means "moon" to be the radical to represent 肉 or "meat." Although the 月 character itself is common enough, it is rarely used as a radical meaning "moon" which makes it a great target for assimilation.
Stabilizing the amount of characters not only includes the overall count, but also the amount that is to be used at different levels of education: professional vs grade school. There have been several attempts at this, but they have mostly failed. One example was in 1921 where Lu Feikui called for a 2,000 character limit for common usage. Although an overall cap on the number of characters has never come about the modern answer to this question limits the number used at each level. Elementary school students need to know 2,500, 3,500 for junior high, and 7,000 characters for general usage. The important thing to remember about these numbers is that they act as a cap on the number to be used and do not necessarily represent the common number used.
Stabilization of pronunciation has come about due to the inability of the phonetic element of the character to accurately express the full phonetic value of the character. According to Zhou 81% of Chinese characters have these phonetic elements. This number is misleading in the fact that these phonetic radicals play a number of different roles. With 35% of the number, the correct initial and final sounds can be determined but not the tone. With 48%, some aspect (initial, final, or tone) of the pronunciation can be determined by the phonetic element. And with 17% of the characters, the phonetic element is actually misleading in knowing the pronunciation.