Tám US Ngưu Ngưu - Trò poker is a card game designed for four players, with one acting as the banker and the other three as players. Players start by placing chips on the table, followed by the system dealing cards. The game culminates in comparing the card values, with players winning if their hand beats the banker's. Key conditions include Niu Niu having a higher value than any individual card, Niu Niu 9 surpassing Niu 8, and hands with a 'Bò' (a combination of three cards forming an integer) being superior. Non-'Bò' hands are compared based on the highest card present. Note that a 'Bò' must be precisely three cards forming an integer, not a combination of 2-4 cards; otherwise, it is not considered a 'Bò'.