The paradigm of "unlimited growth" capitalism leads to an aggravating the problem of a natural resource shortage, an increase in waste and general pollution of the Earth. The concept of a circular economy (CE) is an alternative to this; it implies a transition to closed production and consumption cycles. The purpose of the article is to supplement this concept with ideas of integrating several rationalizing production models of the CE building at the national production system level, taking into account the country's participation in international trade. These model production models are "flexible custom manufacturing", "distributed manufacturing" and "lean manufacturing", which also means the widespread involvement of small and medium-sized enterprises. The use of digital technologies for a new quality of communication, as well as the creation of sharing centers, in order to achieve greater organizational and technological complexity of the production system is required. The CE building must take into account the country's participation in international trade. Attention is focused on the fact that the CE will have a different effect on certain types of international trade, in particular, it will stimulate such trade as: materials for processing, secondary raw materials, technologies, projects of finished products, R&D services. Purposeful national and global policies, expansion of international cooperation and support of developing countries are needed in order to increase the positive contribution of international trade to СЕ building. Practical recommendations for the CE concept implementation are proposed, including the creation of: information infrastructure for production networks; digital platforms for interaction between producers and consumers; industrial parks, clusters and incubators for new industries, as well as technological, digital and organizational innovation stimulation.

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