This is the 954th most frequent Chinese word.
真的
"真的" means "really" or "truly."
In this sentence, '真的' is used as an adverb to emphasize the extent of how touching the movie is.
这场电影真的很感人。
This movie is really touching.
Here, '真的' conveys the genuineness or truth of the statement regarding what he knows.
他真的不知道这个消息。
He really doesn't know about this news.
In this case, '真的' is used as an adjective describing the noun 'hero,' meaning 'real' or 'genuine'.