'go forward'; also romanized Tien Len) is a shedding-type card game originating in Vietnam.

[1] It may be considered Vietnam's national card game, and is common in communities where Vietnamese migration has occurred.

For the first hand, the player holding the lowest card begins by playing it singly, starting a face-up discard pile in the center.

To play, they must contribute a card or combination to the pile that matches the type (single, pair, etc.)

The exceptions to the strict rule of matching type and beating rank are called bombs and they may be played only against presently-winning 2s as follows: A bomb is not unbeatable but, once played, its type becomes the type that the other players must match and beat, rather than that of the card or combination originally led to the current pile.

If the leader to a new pile has no cards remaining, the lead passes to the next active player to the left.

[2] In all cases, any excess cards have no further role in the hand, and may be set aside face-down.

Published sources do not address this, but the logical resolutions are: Viet Cong (or VC) is an American form, played as above but with these variant rules:[2][6]