Distinguish text, story, and idiom
A classical text may preserve a scene or argument that later readers remember through a compact idiom. The story of waiting by a tree stump in Han Feizi supports 守株待兔, but a learner should still distinguish the passage, the later fixed form, and the modern criticism of passive dependence on luck.
Other phrases are remembered through histories, commentaries, or teaching retellings. The modern headword can be a stable summary rather than a direct quotation. A careful page states the relationship instead of pretending that every four-character form appears unchanged in the earliest source.
Use source families as navigation
Han Feizi is especially useful for cautionary stories about mistaken reasoning, rigid imitation, and political argument. Records of the Grand Historian preserves biographies and events later condensed into phrases about resolve, reputation, strategy, and historical judgment. Later dynastic histories add stories about learning, officials, war, and changing evaluation.
Source families help readers continue their study, but they do not make all phrases in one book semantically similar. Two idioms from historical narrative may differ completely in tone and modern use. The source answers where the remembered material comes from; the entry answers what the phrase does now.
Avoid the famous-story shortcut
A memorable tale can overpower sentence fit. Learners may retell the story correctly and still choose the wrong idiom for a modern context. After reading the source, return to tone, object, cause, and consequence. 守株待兔 requires passive repetition; 破釜沉舟 requires a no-retreat commitment; 刮目相看 requires revised judgment after change.
Do not use a historical association to make a sentence grander than the evidence. A routine work delay is not automatically an epic stand, and a small improvement is not always a dramatic transformation. Plain wording is better when the classical frame would exaggerate the event.
Write a traceable source note
A useful note names the work, explains whether the phrase is quoted or associated, summarizes only the relevant scene, and states the modern learner boundary. It avoids invented dialogue, precise dates without support, and claims that one translation is the only authentic reading.
When sources disagree or multiple traditions circulate, say so briefly. Choose the version used by an official dictionary or a clearly identified text, and explain the choice. This gives readers a path they can verify while keeping the public page focused on learning rather than scholarly performance.