There a lot of other more complex ways on how to place bets in blackjacks.
In this game the player assumes a number for the boy. So don't waste your time looking following a roulette system or a roulette means by which to increase your odds of to win. https://gamein.wiki/nha-cai-rikvip-noi-thoa-man-dam-me-ca-cuoc-cua-ban/