I know we say "do you know who he is / I don't know who he is" but I saw this sentence in an article translated by a Chinese famous translator who was born in 1921 so it is unlikely to send him an email to ask him such a question.
At the beginning of the translation is :
Do you know who is the most well-known person in China?
so
Do you know who is the most ... is in C
or
Do you know who the most... is in C
Which one is correct? Both?