Theres phrase in Chinese: “”. It literally says that a new born cattle do not afraid of tiger. It means that anyone who is very new to a context or situation they are completely unfamiliar with would not aware of the danger or difficulty that lie within it. And thats why they may act unexpectedly brave, such as encounter things that the veteran wouldnt dare to. Its usually used as a positive terms to describe the courageous attitude of younger individuals. As you can see in this comic XD.