Core Points - The article discusses the importance of radiation safety licenses in ensuring radiation safety across various fields, highlighting recent cases from Changsha City, Hunan Province, where the local ecological environment bureau addressed violations related to radiation safety licenses [1][2]. Group 1: Case Summaries - A dental clinic in Furong District failed to renew its radiation safety license on time, leading to the use of an X-ray device without a valid license from March 26 to March 30. However, since the clinic corrected its violation by renewing the license and provided necessary safety reports, it was not subjected to administrative penalties [1][2]. - A dental clinic in Yuhua District also did not renew its radiation safety license, continuing to use radiation devices and earning illegal income of 835.8 yuan. Similar to the previous case, the clinic rectified the issue promptly and complied with safety regulations, resulting in no administrative penalties [2][3]. Group 2: Regulatory Guidelines - Companies involved in the production, sale, or use of radioactive isotopes and radiation devices must apply for a radiation safety license from the relevant ecological environment authority and submit necessary documentation [4]. - The validity of a radiation safety license is five years, and companies must apply for renewal at least 30 days before the license expires [4].

Group 1 - Jiangsu Tianlong Medical Technology Co., Ltd. has been established with a registered capital of 10 million yuan [1] - The legal representative of the company is Liang Jiaming [1] - The business scope includes the operation of Class III medical devices, sales of Class II and III radiation devices, software outsourcing services, development of basic artificial intelligence software, and sales of biological materials [1] Group 2 - The company is jointly held by Xian Tianlong Technology Co., Ltd., a subsidiary of Kehua Bio-engineering Co., Ltd. (stock code: 002022), and Hainan Yikang Medical Technology Co., Ltd. [1]