A man from Hong Kong was caught at a checkpoint at Shenzhen trying to smuggle more than 7,000 diamonds in his underwear, according to a mainland media report.
The man was stopped at the Shenzhen Bay crossing last Thursday after customs officers noticed he was walking in a peculiar manner, the Guangzhou Daily said.
Officers searched him and found a small plastic bag in his underwear containing thousands of small diamonds, semi-finished stones and gold jewellery.
The report said customers officers spent several hours counting 7,443 small diamonds, plus 10 pieces of jewellery weighing about 130 grams.
Anti-smuggling officers are investigating.
Another Hong Kong man was caught at the Lo Wu crossing in January trying to smuggle 4kg of gold in his shoes, according to the Southern Metropolis Daily newspaper.