[Chinese Idioms And Fables] Has never been seen without a book in his hand
This idiom is used to describe being diligent in study.
[Chinese Idioms And Fables] Thirty-Six Strategies 36: If All Else Fails Retreat
If it becomes obvious that your current course of action will lead to defeat then retreat and regroup.
[Chinese Idioms And Fables] Thirty-Six Strategies 35: The Strategy Of Combining Tactics
In important matters one should use several strategies applied simultaneously. Keep different plans operating in an overall scheme; in this manner if any one strategy fails you would still have several others to fall back on.