码长城(mă cháng chéng)

Play mahjong

例：退休后，许多老年人每天都聚集在一起码长城。

（Tùi xiū hòu, xŭ duō lăo nián rén mĕi tiān dōu jù zài yì qĭ mă cháng chéng.）

After retirement, many old people gather together to play mahjong every day.

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