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ID117-East Continues to the Right
Question: Does East remain in the same position after each game?
Answer: No, after the player who is in East position rolls the dice to break the wall, they give the dice to the player on their right. After the completion of the first game, the player with the dice assumes East position and they roll the dice to break the wall and so on.
Source: Mah Jongg Made Easy (2020 page 9 last paragraph)