What industries does traditional manufacturing refer to?

According to the explanation given by the website of the Training Center of the Department of Industrial Engineering of Tsinghua University, manufacturing refers to a new product after physical or chemical changes, whether it is power machinery manufacturing or manual manufacturing; Whether the product is wholesale or retail, it is regarded as manufacturing. Manufacturing industry directly reflects a country's productivity level and is an important factor to distinguish developing countries from developed countries. Manufacturing occupies an important share in the national economy of developed countries. Manufacturing industry includes: product manufacturing, design, raw material procurement, warehousing and transportation, order processing, wholesale operation and retail. China's manufacturing industry is not a real manufacturing industry, but processing on behalf of others. Only low-level employees are needed for OEM, and the real manufacturing industry can really solve the employment problem of college students in China.