襟怀坦白　

◎ 襟怀坦白 jīnhuái-tǎnbái

[openhearted and above board;be magnanimous and unselfish have largeness of mind] 襟怀:胸怀。坦白,开朗,没有隐瞒,形容胸怀坦荡,心中无隐悔之事