Which Chinese card games can I play online here?
BluffKing offers Zha Jin Hua (2–10 players), Dou Dizhu (3 players), Guandan (4 players), Bull (Niuniu) (2–6 players), Sangong (2–6 players), all playable in a browser on Android, iPhone or a computer with nothing to download. The same site also has Xiangyang Ka Wu Xing, Guiyang Chicken Mahjong, Chengdu Mahjong, Chinese Chess and Gomoku, each with its own page. The interface is available in English and Chinese.
Can friends on different phones or in different countries play together?
Yes. Each player opens app.bluffking.ai in their own browser and joins the same room; nobody needs the same app installed. The host shares a link from Invite friends at the table or its 4-digit room code, and friends enter it through Join Game. Playing with other people requires an account, and rooms need an internet connection.
Do the rules match the regional version I grew up with?
Not always. Each game page states the rules used here under Full rules and scoring: Guandan is four-player team play with two decks, Dou Dizhu is fixed at three players, Zha Jin Hua has blind bets, calls and comparisons, and Bull (Niuniu) and Sangong compare banker and player hands. Regional variants are common, so agree on the rules with friends before starting and treat the game page as the reference.
Can I try a game before registering?
Yes. Zha Jin Hua, Dou Dizhu, Guandan, Bull (Niuniu) and Sangong all offer bot play: a signed-out visitor gets a guest session for bot tables, with bots filling the other seats, which is a good way to learn legal plays, hand rankings and scoring first. Creating a room for human players still requires an account. Guest records are not kept permanently; register before continuing if you plan to keep playing.
Is the dealing fair, and is there real money involved?
The server shuffles randomly and enforces plays, comparisons and settlement; clients receive only the cards the rules allow them to see. These games do not publish per-round cryptographic verification records; the Fairness page states what is covered. Everything runs on practice chips or team levels with no monetary value, which cannot be bought, transferred or cashed out, and BluffKing has no real-money play.
I have never played these games. Where do I start?
Each game page has play steps and full rules, and Zha Jin Hua, Dou Dizhu, Guandan and Xiangyang Ka Wu Xing have beginner guides with worked examples. Play one round at a bot table first, then invite friends. The friend-room guide helps you choose by player count.