Title: Single source announcement for the surface fissure filling project of Hongliu Coal Mine from 2025 to 2028. Project name: Hongliu Coal Mine from 2025 to 2028. Inquiry unit: National Energy Group Ningxia Coal Industry Co., Ltd. Proposed supplier name: Ningxia Huakaida Engineering Machinery Co., Ltd. Proposed supplier address: Team 1, Dayangqi Village, Majiatan Town, Lingwu City, Ningxia. Procurement content: 30000388, Hongliu Coal Mine from 2025 to 2028, 1.000AU; Reason for single source procurement: Due to the use of irreplaceable patents, proprietary technologies, or other special reasons, procurement can only be made from a single supplier. The public announcement starts and ends on April 15, 2025 at 9:26:12-2025-04-180 at 9:26:12. Objections to two items are received by the National Energy Group Materials Co., Ltd. Ningxia Branch. Objection contact person: National Energy Group Materials Co., Ltd. Ningxia Branch. Contact phone number: 0951-7678068. Mailing address: 15/F, Block A, Yinglite Building, No. 239 Shanghai West Road, Jinfeng District, Yinchuan City. If there is an objection, please raise it online during the public announcement period. To initiate an objection, please upload relevant attachments, including but not limited to: 1. A written objection letter explaining the detailed reasons. The sentence is:; 2. Relevant evidence and proof materials for affixing the official seal of the unit; Bidding website: https://gd-prod.oss-cn-beijing.aliyuncs.com/upload/cms/article/inquireFive/5366010.html