The company engages in the development of mineral resources projects with a focus on gold and diamond in Cameroon, Africa.
CNK International was established as Koko Entertainment (Korean: 코코 엔터테인먼트), an animation studio founded by Myong Ok Jeon on March 2, 1990.
[1] The company's most recognized branding as a former animation studio was Koko Enterprises Ltd. (Korean: 기업 코코).
In September 2014, the company ventured into further businesses including tests and research projects on agricultural land improvements, services for testing, research, surveying, design supervision, and extension for farming and fishing village maintenance projects and entering the food industry with restaurants.
Kim Eun-seok had shared nonpublic information with family members prior to a press release from the Ministry of Foreign Affairs that deliberately overstated the size of a Cameroon diamond mine.