Niánqīngrén / yīnggāi / guānxīn / shíwù， / liǎojiě / shèhuì / zhèngzài / fāshēng / de / biànhuà。

年轻人应该关心时务，了解社会正在发生的变化。

Young people should keep up with current affairs and understand the changes taking place in society.