童叟无欺

tóng sǒu wú qī

cheating neither old nor young (idiom); treating youngsters and old folk equally scrupulously

Our house offers sincere treatment to all and fair trade to old and young alike.

童

tóng

child

叟

sǒu

old gentleman

无

wú

not to have

欺

qī

to take unfair advantage of