During our investigation of ciliates from Korea, four ciliates were isolated from the non-flood Petri dish culture of soil. They were cultured under laboratory condition and studied using standard methods morphologically, including living observations, protargol impregnations, and morphometrics. The four species are Metopus hasei Sondheim, 1929, Urosomoida agiliformis Foissner, 1982, Oxytricha proximata Shibuya, 1930, and Cladotricha sp. in Nießen (1984) respectively.

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.