1. All of the plaintiff's claims are dismissed.

2. The costs of lawsuit shall be borne by the Plaintiff.

1. Facts of recognition;

A. On June 26, 2013, the Plaintiff, a company engaging in oil supply business, etc., concluded an oil supply agreement with the Joint Development Co., Ltd. (hereinafter “Joint Development”) and supplied oil to the Union development from around that time to January 30, 2015, but did not receive part of the oil price.

B. At the time of the above oil supply contract, the Union Development concluded a contract on the assignment of claims with the main contents such as the transfer of claims to a third-party debtor at the time of delivering a notice of assignment of claims to a third-party debtor (not identified who is the third-party debtor) in order to secure the payment of oil payments to be borne by the plaintiff at the time of the above oil supply contract, and the plaintiff entered into a contract on the assignment of claims with the main contents

[hereinafter] The contract of this case is "the assignment contract of this case" and the assignment contract of this case (Evidence A 3) is "the assignment contract of this case" ("the assignment contract of this case").

After the Defendant received a contract from the Korea Highway Corporation for construction works with the residents residing in the 30th line of the motorway (section 3) and between the project implementer and the joint development on September 2, 2013, the Defendant agreed to subcontract the said construction works and reinforced concrete construction works (three sections) for the total construction cost of the said construction works and the construction period of KRW 9,460,00,000 and December 31, 2015 from September 2, 2013 to December 31, 2015

(hereinafter “instant subcontract”). D. D.

On February 2, 2015, the Plaintiff notified the Defendant of the assignment of claims to the effect that the joint development would transfer to the Plaintiff all of the subcontract price claims owed against the Defendant under the instant subcontract by mail with the content-certified fixed date, and the notification reached the Defendant on February 4, 2015.

[hereinafter] The above notice (Evidence A No. 13) is referred to as "the notice of assignment of claims of this case"]. 【No dispute exists as a ground for recognition, Gap Nos. 1 through 4, 13, and Eul No. 1-1.