Urbanization is a historical process of the transformation of human production and lifestyle from rural to urban, manifested by the process of the transformation of rural to urban population and the continuous development and improvement of cities. The Communiqué of the Third Plenary Session of the Seventeenth Central Committee of the Party stated that by 2020 In 1949, the integration mechanism of urban and rural economic and social development was basically established. Based on the above definitions, Which of the following understandings of urbanization are correct:. ['A large number of farmers have migrated to cities and changed from farmers to citizens.', 'The greater the number of farmers entering the city, the higher the urbanization rate.', 'The more farmers enter the city, the more advanced the social development of this place.', "Industrialization of farmers' production methods and urbanization of lifestyles."]