二八杠 Two-Eight Gang

This is a simple Chinese game. Its name is Er Ba Gang-- Two-Eight Gang. [[ It is sometimes known as Kuangfeng Paijiu 瘋狂牌九 -- Crazy Pai gow or Tui Tongzi 推筒子-- Pushing "Coins" ( as in the suit of mahjong)

Descriptions are sketchy, but the game is simple enough to reconstruct. My primary source is the Chinese Baidu article An article which describes a similar game, Er-Ba-Gang has also proved invaluable

Equipment: All the tiles from the  suit of "Coins" from a mahjong deck, plus the four white Dragons.  The complete "deck" thus contains 40 tiles.
Makers of mahjong equipment sell sets of majhong tiles that are of the above composition.
  If you do not have such a deck, you can make one using western playing cards. Take the ranks of Ace-Nine in all four suits, then add the four jacks to represent the white Dragons

  A pair of dice is also needed, to determine the deal, as described below.

Players
Players compete against a banker. The sources state either two or three players against a banker.

Staking
Players stake money into a pool. Spectators can evidently bet on the game as well.

Deal
Two cards are dealt at a time. The first The baidu article describes how this is done.  The banker throws two dice. He inspects the number they produce.
The banker deals the first pair to himself if the dice produce 5 or  9
The banker deals the first pair to himself  Player  1 if the dice produce   2, 6, 10
The banker deals the first pair to himself  Player  2 if the dice produce 2 3, 7, 11
The banker deals the first pair to himself  Player  3 if the dice produce 3 4, 8, 12

Play
Players expose their tiles.  They compare it with the banker. If their hand is greater than the banker's (as determined below) they win . The converse is true, If they tie [...]

Scoring 

In summary, the rule is as follows
1. Pairs outrank all hands. A pair of White dragons ( B)  is the highest, followed by the numbers, in descending numerical order.

2. When a hand is not a pair, its value is dictated by the sum of its components, modulo 10 The white dragon counts as zero. Thus, a hand of 8,9 Scores Seven, and a hand of 7,3 counts as Zero.

3. With hands that are of the same sum, the highest ranked hand is the Natural number plus a white dragon. So between 5,B and 3,2 the 5,B wins.

4.When white dragons are not involved, the hand that contains the higher card wins. So between the hands 9,6 and 2,3 (both hands score 5) the former wins

The Chinese sources provide a scoring chart, listing the ranks of all 81 possible hands.


Notes

It appears that this game may be played with Chinese Dominoes. The game also bears similarities to Koo Kiew and Daun Tiga.