In the early 1980s, in preparation for a planned and systematic dissemination, Zhang distilled his 10-plus years of teaching experience into four principles: appropriate focus, repetition, readings from Russian-language works and teaching each student according to ability.
經過整理歸納，張思中將十多年的實踐心得濃縮成「適當集中、反覆循環、閱讀原著、因材施教」十六字，準備做有系統、計畫的推廣。