Tiny memory cards and fluffy teddy bears are among the most popular items for North Koreans shopping in Dandong, China's gateway city to its impoverished and isolated neighbor.

The teddy bears are often the souvenir of choice for young North Korean women returning home from contract work in Chinese restaurants and factories. Their remittances have become an increasing source of revenue for Pyongyang.

North Korean traders are the big buyers for the memory cards — and that could get them into trouble back home.