忠贞不渝

zhōng zhēn bù yú

unswerving in one's loyalty (idiom); faithful and constant

忠

zhōng

loyal; devoted; faithful

贞

zhēn

chaste

不

bù

no; not so

渝

yú

short name for Chongqing 重慶|重庆[Chong2 qing4]