1. The plaintiffs' appeals against the defendants are all dismissed.

2. The costs of appeal are assessed against the Plaintiffs.

1. Basic facts

A. The status of the parties is the executing company B main complex construction project (hereinafter “instant project”), and the wall mountain construction company (hereinafter “ wall mountain construction”) entered into a construction contract with the Plaintiffs on November 11, 2009. The Defendants are either persons or companies who subcontract part of the instant project from the wall mountain construction or supply materials to the wall mountain construction.

B. The construction of each subcontract agreement on the instant project was concluded with Defendant YSD Co., Ltd. (hereinafter “YSD”), Defendant NSD Co., Ltd. (hereinafter “HSD”), Defendant CFFC Co., Ltd. (hereinafter “SSFF”), Defendant New HS Industry Co., Ltd., Ltd. (hereinafter “SSFFC”), Defendant New HPP Co., Ltd., Ltd. (hereinafter “new HPP”), Defendant LPP Industries Co., Ltd. (hereinafter “HP Industries”), Defendant LPP Co., Ltd. (hereinafter “SP”), Defendant New HHD Co., Ltd. (hereinafter “E”), Defendant New EF system Co., Ltd. (hereinafter “digital”) and Defendants Co., Ltd., Ltd., Ltd. (hereinafter “SE”), as evidence of the subcontract agreement on behalf of the Defendants Co., Ltd. (hereinafter “UFD”) with respect to each of the following projects: the subcontract agreement was concluded on behalf of the Defendants Co.,, Ltd. (hereinafter “UFD”) and the Defendants Co., Ltd.

YED 1,913,450,00 original 1,408,780,780 won, but it was increased on December 14, 2011, and KRW 1,913,450,000.