Be aboveboard
Chinese idiom, Pinyin is l ě ilu ò B ù f á n, which means magnanimous and extraordinary. It comes from Wang Ju, the second miscellany of Taiping Guangji.
Idiom usage
The master has a good idea. Young people also see that the elder is very upright. If the abbot of the temple decides to contribute to the court, the master will be promoted. The third chapter of Fang Ruhao's Chan Zhen Yi Shi in Ming Dynasty
The origin of Idioms
"Taiping Guangji · miscellaneous records 2 · Wang Ju" said: "and the language, open and extraordinary, ask his surname, is Wang Ju also."
Be aboveboard
have only bare necessities at home - shēn wú cháng wù
it is hard to wait till the huanghe river is clear - hé qīng nán sì