言而有信 (yán ér yǒu xìn) | Meaning: to speak and keep one's promise (idiom); as good as one's word | Chinese Idiom with Pinyin & Origin

to keep promises守信shǒu xìn

honest诚实chéng shí

(idiom) it's a deal · that's settled then一言为定yī yán wéi dìng

one must be a man of his word and resolute in his work (proverb)言必信，行必果yán bì xìn , xíng bì guǒ

(lit.) a promise worth a thousand pieces of gold (idiom) · (fig.) a promise that can be counted on一诺千金yī nuò qiān jīn

to make a solemn vow信誓旦旦xìn shì dàn dàn

to speak and keep one's promise (idiom); as good as one's word