a benign countenance
It is a Chinese idiom, pronounced h é y á NYU è s è, to describe kindness and amiability.
explain
It describes being kind and amiable. The same as "harmonious face"
source
In the Analects of Confucius, Wei Zheng said, "when Zi Xia asked about filial piety, Zi said," it's hard to be lustful. " Liu Baonan quoted Zheng Xuan of the Han Dynasty as saying: "it's difficult to speak in a harmonious way."
a benign countenance
thinking of absent friends or relatives - tíng yún luò yuè
keep one 's heart as hard as the nether millstone - xīn rú tiě shí