Group 1 - The project involves the procurement of a spherical aberration-corrected transmission electron microscope for Nanjing University with a budget of 43 million RMB [3] - The contract delivery period is set to be completed within 18 months after the contract signing [3] - Joint bids are not accepted for this project [3] Group 2 - The tender documents can be obtained from September 1 to September 5, 2025, during specified hours [4] - The cost of the procurement documents is 500 RMB, and no refunds will be provided after purchase [4] - Required documents for obtaining the tender include an authorized letter with a company seal and a copy of the ID of the authorized person [4] Group 3 - The project contact person is Zhang Ting, and further contact details are available at the end of the article [5]