The ones that need to be imported are divided into three main categories, the first is the raw materials category, the second is the high-tech category, and the third is the food or grain and oil category, which are completely insufficient domestically produced, and must rely on some or most of the imports.
1, the raw materials category, including oil, uranium raw materials for nuclear power plants, iron ore for steelmaking.
2, high-tech categories, including computer chips (CPU) hard disk memory, machine tools, numerical control systems, industrial controllers, high-grade bearings.
3, food and oil must be imported, including corn, soybeans, rubber, palm oil (production of instant noodles must be), sugar and so on.
In industry, with the load, speed, precision, corrosion and other factors will have to be imported:
1 load, such as bearings, the load to a level that can only be imported, such as rolling mill bearings,
2 speed, such as hydraulic cylinders, to a speed that will have to be as soon as possible,
3 precision, such as servo systems, to a precision, it is can only be imported
4 corrosion, such as chemical manufacturing, such as seawater corrosion resistance, the key materials must be imported