Sheng ji

''Sheng ji'' is a family of point-based, trick-taking card games played in China and in Chinese immigrant communities. They have a dynamic trump, i.e., which cards are trump changes every round. As these games are played over a wide area with no standardization, rules vary widely from region to region.

The game is most commonly played with two decks of cards, which can be called ''bāshí fēn'' (, 'eighty points'), ''tuō lā jī'' (, 'tractor'), ''shuāng kōu'' (, 'double digging out'), or ''shuāng shēng'' (, 'double upgrade'); another variant is called ''zhǎo péngyǒu'' (, 'Finding Friends'), which has five or more players and two or more decks. Alternatively, it can be played with one deck, in which case the game may be called ''dǎ bǎi fēn'' (, 'competing for a hundred points') or ''sìshí fēn'' (, 'forty points').

The article below mainly describes the ''bashi fen'' variant, with players playing with two decks and in fixed partnerships. Provided by Wikipedia