What not to do on the North Korea border (8 images)

Chinese public service notices regarding North Korea are posted next to a military outpost on the Yalu River across from North Korea in Dandong, China's largest border city with North Korea, in Liaoning Province, on May 30, 2015. China remains North Korea's most important ally, providing Pyongyang with most of its food and energy supplies and comprises over sixty percent of its total trade volume. North Korea's economic dependence on China continues to grow due to international sanctions, as indicated by the significant trade imbalance between the two countries. Photo by Stephen Shaver/UPI

Chinese public service notices regarding North Korea are posted next to a military outpost on the Yalu River across from North Korea in Dandong, China's largest border city with North Korea, in Liaoning Province, on May 30, 2015. China remains North Korea's most important ally, providing Pyongyang with most of its food and energy supplies and comprises over sixty percent of its total trade volume. North Korea's economic dependence on China continues to grow due to international sanctions, as indicated by the significant trade imbalance between the two countries. Photo by Stephen Shaver/UPI

Chinese public service notices regarding North Korea are posted next to a military outpost on the Yalu River across from North Korea in Dandong, China's largest border city with North Korea, in Liaoning Province, on May 30, 2015. China remains North Korea's most important ally, providing Pyongyang with most of its food and energy supplies and comprises over sixty percent of its total trade volume. North Korea's economic dependence on China continues to grow due to international sanctions, as indicated by the significant trade imbalance between the two countries. Photo by Stephen Shaver/UPI

Chinese public service notices regarding North Korea are posted next to a military outpost on the Yalu River across from North Korea in Dandong, China's largest border city with North Korea, in Liaoning Province, on May 30, 2015. China remains North Korea's most important ally, providing Pyongyang with most of its food and energy supplies and comprises over sixty percent of its total trade volume. North Korea's economic dependence on China continues to grow due to international sanctions, as indicated by the significant trade imbalance between the two countries. Photo by Stephen Shaver/UPI