A. The defendant's status is the execution company of the construction project for creating a D Industrial Complex (hereinafter "the industrial complex of this case") in the first place of the Gyeongnam Development Group C.

B. 1) In order to create the instant industrial complex against the Plaintiff, the Defendant’s request for the design of the design, etc. for the construction of the instant industrial complex is required to reduce the sloping surface around the site of the instant industrial complex, to ensure the stability of the sloping surface, and to ensure the stable management of the mountainous district, the sloping surface as a whole (hereinafter “the instant sloping surface reinforcement project”).

(2) On January 2013, 2013, the Defendant requested the Plaintiff to perform the instant work design regarding the Amnesty Reinforcement.

C. On January 24, 2013 and May 25, 2013, the Plaintiff: (a) ordered employees E and F to conduct a field investigation on the instant site for the instant industrial complex; (b) prepared drawings, specifications, estimates, and safety review reports on the instant private surface reinforcement works; and (c) delivered performance products (such as drawings, reports, specifications, etc.) to the Plaintiff on March 12, 2013. According to the estimate submitted by the Plaintiff, the construction cost of the instant private surface reinforcement works was KRW 5,184,00,00 (excluding value-added tax). (b) The Defendant requested the Plaintiff to reduce the construction cost of the instant private surface reinforcement works; and accordingly, the Plaintiff, around May 7, 2013, drafted some of the construction cost of the instant private surface reinforcement works to the Defendant with a written estimate of KRW 3,94,00,000,000 (value-added tax estimate of KRW 10,000,000,00.

(1) A design modification, etc. due to surface destruction, etc. shall be performed by the Defendant on or around February 2014 regarding part of the site of the industrial complex of this case, and a zone in the attached Form B (hereinafter referred to as the “attached Form”).