RCEP, through its unique rules of origin accumulation, promotes mutual tariff concessions between Korea and China, reduces trade production costs, and will further promote the negotiation of the Korea-China FTA. Focusing on the post-epidemic era, South Korea and China should strengthen the consensus on economic and trade cooperation and use the higher standard and more comprehensive RCEP agreement to achieve a mutually beneficial and win-win situation. The industrial supply chain between South Korea and South Korea is the result of the spontaneous formation of the market, mutual benefit and win-win results. Third-party markets such as the Far East can better cooperate to provide impetus for the economic development of the two countries and the recovery of the world economy.