On June 28th, China's first domestically-developed 200kV field emission commercial transmission electron microscope was officially unveiled in Wujiang. This transmission electron microscope is an innovative achievement by Suzhou Bozhong Instrument Technology Co., Ltd., a local enterprise in Wujiang Development Zone. After five years of dedicated efforts and breaking through numerous technical barriers, the company has successfully localized high-end scientific instruments, with the performance of this product matching that of advanced foreign counterparts. The launch of this transmission electron microscope is of extraordinary significance. It has completely broken the long-standing passive situation where China relied heavily on imports for high-end transmission electron microscopes and was constrained by others. It has set a new milestone in the process of independent development of high-end scientific instruments in China and injected strong impetus into the development of related industries. **Long-term Reliance on Imports** In the field of microscopic observation, transmission electron microscopes are crucial tools. They play a key role in strategic fields such as semiconductor technology, cutting-edge materials science, life science research, and atomic-level manufacturing. The degree of independent control over their technology directly affects the country's strategic scientific and technological strength as well as the safety and stability of the industrial chain. The development of transmission electron microscopes in China has been full of twists and turns. Due to various reasons, domestic research and development of transmission electron microscopes was once interrupted. As a result, for a long time, there was no domestic enterprise producing transmission electron microscopes, and the market was completely dependent on imports. In 2022, China imported about 300 transmission electron microscopes at a cost of more than 3 billion yuan. Such a huge import scale and high cost reflect the urgent domestic demand for such equipment and the serious shortage of supply. Western countries have long imposed a blockade on China's core technologies, leaving China long dependent on overseas sources for the core components of transmission electron microscopes. This technological blockade has not only restricted the development speed of China's related industries but also brought potential risks to the security of the national industrial chain. Despite the huge domestic market demand for transmission electron microscopes, domestic products have been unable to meet market needs due to technical bottlenecks. Especially in the market for high-end models such as 200kV field emission transmission electron microscopes, domestic products have accounted for almost zero. High-end models play an irreplaceable role in scientific research and industrial production, and the lack of domestic products has forced China to rely on imported equipment in the field of high-end microscopic observation, further exacerbating China's technical predicament in this field. **Five Years of Overcoming Challenges** Against this background, Bozhong Instrument resolutely decided to become a pioneer in innovation in the field of transmission electron microscopes and embarked on the arduous journey of independently developing high-end transmission electron microscopes. The road of independent research and development has been full of thorns. The shortage of talents made it difficult for the R&D team to quickly form a professional and experienced team; the technical gap meant that every step had to be explored from scratch without existing experience to draw on; the lack of a supply chain made it extremely difficult to purchase the required components; and the shortage of resources and funds brought enormous pressure to the R&D work. With the belief in overcoming difficulties and striving for excellence, Bozhong Instrument's R&D team never gave up on the arduous road of independently developing high-end transmission electron microscopes. Through unremitting efforts, they have achieved a series of results: in 2022, they successfully developed China's first 200kV transmission electron microscope prototype, breaking the technical blockade; in 2024, they completed the upgrade of the second-generation product, with improved performance and reliability; in 2025, China's first commercial 200kV field emission transmission electron microscope was launched, giving China the confidence to compete with international giants in the field of high-end microscopic instruments. "After five years of technical research and repeated refinement, from the whole machine product to every key component, Bozhong Instrument has now firmly grasped the core technologies of the entire chain in its own hands," said Tang Aiquan, general manager of Bozhong Instrument. **Reaching 0.25 Nanometers** It is understood that the point resolution of this transmission electron microscope reaches 0.25 nanometers, and various technical indicators have reached the international first-class level. This seemingly tiny data is of great significance in the field of microscopic observation. Liang Jing, technical director of Suzhou Bozhong Instrument Technology Co., Ltd., explained that 1 nanometer is equal to one billionth of a meter, and the periodic structure of atomic arrangement is generally between 0.1 nanometers and 2.0 nanometers. Such high resolution makes this transmission electron microscope highly valuable in applications in fields such as semiconductors and materials science, and can provide more accurate microscopic information for scientific research and industrial production. However, Bozhong Instrument is not satisfied with its existing excellent achievements. They are well aware that science and technology are developing rapidly, and only through continuous innovation can they remain invincible in the fierce market competition. Therefore, Bozhong Instrument will continue to deepen its efforts in the field of electron beam core technologies, continuously increase R&D investment, and improve technical levels. In the future, Bozhong Instrument will also continue to expand and improve its product line matrix, launch more high-performance and high-quality products to meet the needs of different customers. They are determined to be a leading enterprise that dares to tackle "tough problems" and make greater contributions to the development of China's high-end microscopic instrument field, promoting China to a new height in the field of microscopic observation.