Ukraine itself is the second country of the Soviet Union, and some scientific and technological equipment are bases and research centers set up in Ukraine. At that time, Ukraine was also called the granary of the Soviet Union, which shows the importance of Ukraine to the Soviet Union. After the disintegration of the Soviet Union, 35% of the heavy industry base was allocated to Ukraine, which even possessed nuclear weapons. This kind of strength is estimated to be unimaginable in Vietnam.
In ancient times, Vietnam was a dependency of China, where nothing grew, and people who committed the most heinous crime of exile in ancient times were sent there. Later, it was colonized by Britain and France, where it was also exploited miserably. Then North Vietnam hit France and the United States one after another, and also hit South Vietnam, with heavy casualties. After reunification, China was provoked and China fought back in self-defense, and the war didn't stop until the late 1980s. All these make Vietnam's national strength weak, even hit hard, and there is no time to develop the national economy.
Recently, Vietnam robbed the United States of its investment in China, and the domestic situation was very good for some time. However, there are also some risks, that is, the settlement of foreign debts in dollars can easily lead to the dollar trap, that is, the United States divides part of its domestic economic crisis into countries settled in dollars, and the national economy fluctuates slightly, which may seriously lead to people's difficulties.