"Tractor," also known as "Double Kou" and called "Eighty Points" in southern regions, is a widely popular card game across the country. It evolved from the famous card game "Upgrading." Similar to "Upgrading," the game involves four players competing in pairs, scoring points, and advancing levels. Its basic rules are similar to "Upgrading," featuring simplicity and strong competitiveness. While retaining the aforementioned advantages of "Upgrading," "Tractor" increases the number of cards (from 54 to 108) and removes restrictions on bottom card point suppression, making the game more varied. The introduction of card playing forms such as "pairing cards" and "tractors" (which is also where the game gets its name) and rules like "double kou doubling" adds more entertainment and excitement to the game. Due to its extensive popularity, there are slight variations in the rules across different regions, so this game offers multiple rule options for players to choose from. The enhanced version of "Tractor" updates two sets of exquisite female character card faces, five card backs, and background music/sound effects based on the original version. We welcome you to download and use it.