A. On December 28, 2010, the Plaintiffs: (a) set the representative company for the Cheongjin Comprehensive Construction Co., Ltd. (hereinafter “Dajin Comprehensive Construction”); (b) set the ratio of shares of Plaintiffs 50.44% for the Cheongjin Comprehensive Construction Co., Ltd.; (c) 26.74% for the Cheongjin Comprehensive Construction Co., Ltd. (hereinafter “Cheongjin Comprehensive Construction”); (d) 22.42% for the Cheongjin Comprehensive Construction Co., Ltd. (hereinafter “Cheongjin Comprehensive Construction”); and (e) set up a joint supply organization with the Defendant for the Cheongjin Comprehensive Construction Co., Ltd. (hereinafter “Ssung Comprehensive Construction”) with the contract amount of the 31,232,883,062 won (including value-added tax; hereinafter the same shall apply); and (e) started on December 15, 2015 (hereinafter “the construction contract”).

B. After the conclusion of the instant contract, the amendment to the instant contract was concluded on a total of nine occasions, as indicated below, and the construction period was extended four times on the grounds of the excavation and investigation of cultural heritage and the suspension of construction during the same period.

- The first ground for extending the number of days of the extension of the deadline for the completion of the contract as of December 3, 2010 - 1st - February 13, 2012 - design modification - 2nd - design modification - 3rd - June 28, 2013 - design modification - 4th 4th 5th 17th 2, 2015 for the installation of cultural heritage, excavation and investigation on August 13, 2014 and 4th 5th 5th 2, 2015 - 6th 13th 2, 2015 - 14th 6th 2, 2015 - 16th 5th 2, 2015 - 13th 2, 2015 -6th 13th 2, 2014 -6th 2, 2015 -6th 3th 15th 2, 2015.