A total of 184 shops in Guangzhou were found selling surveillance cameras or other equipment that could be used to cheat in mahjong games - in a joint action by police and the industrial and commercial bureau on Tuesday, reports Guangzhou Daily.

The equipment can be used on "automatic" mahjong tables, which shuffle and distribute tiles for players. According to the equipment manual, the item can be installed within 10 minutes and allow the game to be manipulated by remote control. Police also found a batch of spy cameras - small enough to fit in belt buckles and buttons - also believed to mainly be used to cheat in games of chance.

The production and sale of surveillance equipment requires special licensing, warned Liang Xingxia, deputy director of the Municipal Public Security Bureau.

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