FIFA and national leagues at all levels will require each team to prepare the uniforms for the first game (usually at home) and the second game (away), and the colors of the two sets of jerseys must be clearly distinguished. When organizing a competition with a better schedule, the visiting team will determine what kind of clothes to wear before the competition to avoid color conflict with the home team. If the game is played in a neutral stadium, they can all wear the uniforms of the first game (if the colors don't conflict). If the colors conflict, the captain will be arranged to draw lots, and the result of the lottery will determine which team will wear the jersey of the first game, and the other pair can only choose the away jersey. Never wear a training vest to play a game.
Folk competitions don't matter, vest, shirtless and anti-wear are ok!