1. The Defendant’s KRW 4,202,472,561 as well as the Plaintiff’s KRW 6% per annum from January 22, 2015 to April 5, 2019, and on April 6, 2019.

1. Basic facts

A. On October 5, 2004, the Plaintiff formed a contract under a long-term contract with B Co., Ltd. (hereinafter “B”) by setting the total additional construction cost as KRW 106,036,00,000 for the Defendant and C Road Construction Work (hereinafter “instant construction work”), and the total construction cost as KRW 1,800 for the period of construction work (hereinafter “instant contract”).

B. The Plaintiff entered into a subcontract with D Co., Ltd. (hereinafter “D”) with respect to some of the instant construction works.

C. The instant contract was concluded by the method of a long-term continuing contract, and was modified on February 18, 2008 by the method of continuing expenditure contract, and was subsequently modified on six occasions thereafter.

The details of changes and the reasons for the change of the deadline for completion shall be as follows:

(1) 1. 2. - the first 2. 1. 2. - the second 2. 2. - the second 1. 2. 3 - the first 2. 3 1. 206 - the second 1. 2. 3 : the second 2. 1. 2. 1. 2. 3 - the second 1. 206 - the second 1. 3 1. 206 - the second 1. 2. 3 : the second 1. 2. 2. 1. 206 - the second 1. 3 : the second 2. 2. 1. 201 - the second 1. 3 1. 20 : the second 4. 2. 1. 201 - the second 2. 1. 201 - the second 2. 18 2009 - the second 1. 2. 20. 18. 2. 20. ;

D. The Plaintiff’s extension of the construction period from B on December 10, 2014 to B against the Defendant.