1. The part against the defendant among the judgment of the court of first instance is revoked, and the plaintiffs' claim corresponding to the above revoked part is filed.

1. Basic facts

A. The conclusion and amendment of the instant contract 1) Plaintiff A Co., Ltd. (hereinafter “Plaintiff A”).

(B) The Plaintiff’s Debtor B’s administrator of the Plaintiff’s Debtor B’s lawsuit (mutual name was changed in sequence to E, D, and B, and hereinafter “Plaintiff B” in total before and after the mutual change.

The Defendant’s “H Corporation” (hereinafter referred to as the “instant Corporation”) shall be the F and G members of Chuncheon City, a procuring entity.

(2) The joint supply and demand organization (hereinafter referred to as the “joint supply and demand organization of this case”) represented by the Plaintiff A to perform the work under contract.

2) On December 26, 2005, the instant joint contractors concluded a contract for the primary construction work (the construction amount of KRW 117,000,000, the construction period of KRW 117,000,000, and the construction period of December 28, 2006) with the Republic of Korea (the Gangseo-gu Government Government Government Government Government Agency) by adding the total cost of a long-term contract to the total cost of KRW 29,125,689,253, and the total construction period from December 28, 2005 to 1,860).

3) General conditions of the construction contract incorporated under the said contract (hereinafter “instant general conditions”)

4) After all, the joint supply and demand organization of this case entered into a construction contract or modification contract with the Defendant, as described in the attached Table 2 of the change of the contract.

(hereinafter collectively referred to as the “instant contract”). Accordingly, the instant contract finally changed to the total construction cost of KRW 36,693,00,000 and the final completion date of construction work on November 26, 2015, thereby extending the total construction period of KRW 3,621.

B. On December 30, 2014, Plaintiff A applied for the adjustment of the contract amount to the Defendant on the basis of the extension of the total construction period of the instant construction project, and applied for the adjustment of the contract amount following the extension of the re-construction period on December 9, 2015. (2) The Defendant applied for the adjustment of the contract amount following the extension of the re-construction period. (3) On January 6, 2015 and December 30, 2015, to the Plaintiffs on December 30, 2015.