I tell my child what to do in front of the other child so that she tries to manage the situation herself. At the same time, the other child gets a message.

if my girl complains of someone pushing her ...I tell her in front of the other child that she shud tell him not to push her...I feel it's very imp for a child to be independent and to be able to handle situations on their own... this has always worked... n this way the odr child also understand what he did wrong n neither if them r insulted

scolding a kid in front of others is not polite. neither ours nor someone else's. so I definitely won't scold other kid ( actually that would be embarrassing for other parent too) but if other parent scold my kid once in a while (not too harshly) I'll be chill about it