Recently, the Leading Group for the Administration of National High tech Enterprise Recognition officially announced the results of the second batch of high tech enterprise certifications for 2025. Thanks to its solid R&D strength, outstanding technological innovation capabilities and standardized enterprise management, Tianjin Kede Technology Co., Ltd. has successfully passed the assessment and officially been recognized as a National High tech Enterprise.

The highly anticipated 2025 Munich Shanghai Photonics Expo grandly kicked off at the Shanghai New International Expo Centre from March 11 to 13, 2025. Marking the exhibition’s 20th anniversary, this year’s event adopts the theme "Dedication Over Decades, Intelligence Lights a New Journey". It gathered tens of thousands of enterprise representatives, experts, scholars and industry elites in the laser and optoelectronics sectors from across the globe, witnessing the vigorous development of optical technology and looking forward to boundless future possibilities.

The 25th China International Optoelectronic Exposition (CIOE) was grandly held in Shenzhen from September 11 to 13, 2024, with an exhibition area exceeding 240,000 square meters.

1. Introduction As an essential type of refrigeration equipment, cryogenic units are widely applied in modern industry, scientific research, medical treatment and other fields. This paper elaborates on the historical evolution, current development status and multi-industry applications of cryogenic units in detail.