How North Korea relies on to withstand international sanctions

First of all, it is the support of Russia and China. Secondly, North Korea has almost no external economy. There are also countries such as China, Russia, and Cuba. These countries have different political opinions from countries such as the United States, Japan, and South Korea. Although China also opposes North Korea's testing of nuclear weapons, But China also hopes that North Korea will attract the attention of the United States, Japan, and South Korea, so it will not block North Korea