1. Facts of recognition;

A. The Plaintiff and the Defendant’s conclusion of each construction contract for each construction project is 1) a construction contract for a construction project that the Plaintiff engaged in the construction project under the trade name “D” (hereinafter “C-site construction contract”) between the Defendant and the Plaintiff, on May 2018, and the Plaintiff, from the Defendant to the construction site of Gangseo-gu Seoul Metropolitan Government, Gangseo-gu Seoul Metropolitan Government, where the Plaintiff is a principal contractor for the construction project, for the lease and installation works at the construction site of the Gangseo-gu Seoul Metropolitan Government, where E is a principal contractor for the construction project (a temporary installation board used in the industrial sites, such as construction and construction, or for the maintenance and management of facilities), with the construction period fixed as KRW 281,015,130 (hereinafter “C-site construction contract”). The construction contract for the construction project that was executed under the said construction contract shall be paid by the Defendant

(2) On May 10, 2018, the Plaintiff entered into a contract for construction works at the Osan site with the Defendant for construction works, and the Plaintiff entered into a contract for construction works with the Defendant, setting the system-based rental and installation works from January 31, 2018 to October 31, 2019, with a construction period of KRW 290,000,000 (hereinafter “Osan site construction contract”); the construction works executed under the said construction contract; the construction works to be paid by the Defendant under the said construction contract; and the construction work cost to be paid by the Defendant to the Plaintiff at the Osan site construction site (hereinafter “the construction cost at the Osan site”).

3) On May 10, 2018, the Plaintiff entered into a contract for construction works at the Sejong-si site (A) and the Defendant for construction works that the Plaintiff received from the Defendant for the construction site of stone construction to December 31, 2018 with the construction period fixed as KRW 356,39,200, among the construction works at the Sejong-si site among the construction works at the Sejong-si site where H Co., Ltd. is the principal contractor, and the Plaintiff should pay the Defendant for the construction works conducted under the said construction contract.