Customs in Shenzhen, Guangdong Province, recently inspected and retained a young man who tried to smuggle 14 diamonds, weighing a total of 7.1 karats, in his wallet.

This isn’t the first case of attempted diamond smuggling. Previously, the local customs department uncovered 133 diamonds hidden in one man's underwear. Officials have also found 14 diamonds next to people's zippers, 13 in socks and 22 in cigarette packs.

The cases can largely be divided into two categories. In the first category are people who smuggle the diamonds to earn a commission; in the second category are jewelry merchants who smuggle the goods themselves in order to process and sell them.

Customs officials warn travelers that any valuable goods must be reported. Failure to do so will be judged as a violation of the law.