Nanjing Institute of Surveying, Mapping & Geotechnical Investigation Co. Ltd. (300826.SZ) stated on the investor interaction platform on August 8th that the company currently holds nine Grade A surveying and mapping qualifications including terrestrial surveying, aerial photography surveying and mapping, photogrammetry and remote sensing, engineering surveying, marine surveying, boundary and real estate surveying, geographic information system engineering, map production, and internet plus-related map services, and can carry out various types of surveying and mapping businesses currently available in the market. Currently, drone low-altitude photogrammetry has become a popular surveying and mapping technology, and the company has the corresponding qualifications and personnel.