Industrial structure policy: refers to the policies formulated by the government to promote the adjustment, optimization, and upgrading of the country's industrial structure within a certain period of time. Based on the above definition, which of the following policies is not an industrial structure policy? ['Protection and support for the tertiary industry.', 'For the processing of agricultural products and products, promote the form of company plus farmers.', 'Take "close, stop, and turn" to "five small" industries.', '"3C" certification for certain industrial products.']