Wages in Vietnam are so low, why don't some foreign companies set up factories there?

There are many industrial zones in southern Vietnam, mainly furniture factories, hardware factories, mold factories and garment factories in Taiwan Province Province (even Foxconn in Taiwan Province Province has entered Vietnam), and high-tech electronics factories in Japan and South Korea (Samsung, Canon, etc.). ), automobile assembly lines, textile mills in China, garment processing factories, feed factories and joint-venture factories, involving almost all industries. According to the latest data, there are already large and small industries in the south. The reason why Vietnam attracts so many foreign companies is mainly the preferential policies provided by the government and the current cheap labor. Some factories in China also take a fancy to the export advantage, and many products exported to the 10 ASEAN countries through Vietnamese factories are duty-free.