As far as I know, autumn promotion and winter promotion are promotion activities of game platforms, aiming at increasing game sales and attracting more players. The discount of autumn promotion may be greater than that of winter promotion, because there will be more special offers and new versions released during winter promotion, and manufacturers will lower the game price in order to attract players. During the winter promotion period, players can enjoy game discounts, extra rewards, free games, double points and other preferential activities.