知无不言，言无不尽 (知無不言，言無不盡) zhī wúbù yán, yán wúbù jìn

zhī wúbù yán, yán wúbù jìn phrase not hiding anything he knows, not stopping before he has said it through; frank; outspoken
Domain: Proverb 谚语
Notes: (CC-CEDICT '知無不言，言無不盡')