In the movie Black Panther, all the audience will find that the Wa Kangda people will cross their arms in front of them when they meet and salute. This gesture, together with the classic line "Wa Kanda Forever" which runs through the whole movie, forms a very brainwashing cycle.
Especially at the beginning of the battle, Panther T 'Challa took the lead in crossing his arms in front of the soldiers and shouting "Long live Kanda", which was quite exciting.