Test analysis: According to what we have learned, from 1953 to 1957, we should carry out socialist transformation of capitalist industry and commerce, individual handicrafts and small businesses, and carry out agricultural cooperation in rural areas. The essence of the "three major transformations" is to change private ownership into public ownership. Through the transformation, China's ownership structure has undergone fundamental changes, that is, changing private ownership into public ownership. The statement of CD does not conform to historical facts.