This study explores the concept related to hydrogen and its manifestation in hydrogen Chinese medicine (HCM) from the perspective of traditional Chinese medicine (TCM) theory. It provides a comprehensive overview of the current research status in hydrogen medicine from both modern medical and TCM perspectives. Furthermore, it outlines the future directions to integrate hydrogen into HCM. In modern medicine, extensive research on hydrogen has targeted at the conditions including respiratory, endocrine metabolic disorders, cardiovascular and cerebrovascular diseases, and eye-related illnesses. Research findings have indicated the hydrogen's beneficial role in prevention and treatment, yet challenges still remain, such as limited clinical trials and undefined molecular mechanisms. HCM is an emerging field of research, which currently only focuses on hydrogen's synergistic effects with traditional Chinese medicines and the development of related equipment. Future research in HCM should delve into how hydrogen aligns with the principles of TCM treatment, establish a theoretical framework for HCM, and develop HCM therapeutic methods. It should also employ modern scientific research methods to evaluate the feasibility and mechanisms of hydrogen under the guidance of TCM theories. Additionally, conducting clinical trials to provide clinical data for HCM applications will provide valuable insights for the diversified development of hydrogen medicine.

Hydrogen has shown broad prospects in agricultural production due to its conducive biological effects, such as antioxidation, regulation of growth factors and enzyme activities, as well as its high safety in practical applications and environmental protection. In this paper we review the research progress of hydrogen utilization in agriculture and summarize hydrogen application methods. We also pinpoint the physiological and biochemical impact of hydrogen on promoting plant rooting and sprouting, regulating yield/quality of agricultural products, improving plant stress resistance, extending the shelf life of agricultural product, and enhancing the survival rate of animal breeding and the quality of resultant products. In addition, we also prospect the development of hydrogen in agriculture. In the future, hydrogen agriculture will focus on the research and development of key technologies, expansion of its application scopes, environmental protection and sustainable development, and market promotion. Hydrogen agriculture is expected to significantly contribute to the sustainable development of China's agriculture.

Hydrogen metallurgy in the steel industry will be the main scenario for large-scale hydrogen application in the future. Blast furnaces can use hydrogen as a reducing agent to replace the traditional carbon-based reduction process, thereby reducing greenhouse gas emissions. In the process of hydrogen metallurgy, establishment of an efficient and reliable hydrogen storage industry chain is the key to success. A brief review on hydrogen metallurgy and worldwide development of hydrogen storage and transportation tech especially via solid-metal hydride is given in this paper. Combined with the demand on hydrogen storage and transportation for hydrogen metallurgy, a scheme for massive H2 usage in iron&steel plant via conceptional "gas-solid-gas phases" separate charge&discharge system by solid-metal hydride is proposed to reach a theoretically economic, safe, longdistance and scale-up industrial application. In the future, production and storage&transportation for massive H2-contained solid material for raw-material handling process in iron&steel or chemical plants will be realized by attainable engineering, which will propel revolutionary change in the upstream alloy industry and green H2-via-renewable industry.

Slush hydrogen, characterized by its commendable energy density and superior rheological properties at low temperatures, is considered a pivotal fuel for future rocket propulsion and a coolant in neutron sources. However, the complex mechanisms of solid-liquid two-phase flow and the limitations inherent in current preparation technologies curtail its broader application within the field. This review delineates the development trajectory of slush hydrogen research and sums up pivotal discussions on its thermophysical properties, methodologies for preparation and measurement, alongside flow and heat transfer dynamics. Comparative analyses of various preparation methodologies elucidate their underlying principles, merits, and demerits. Furthermore, the paper encapsulates the challenges of pipeline pressure drops and heat transfer mechanisms during transit, with a concentrated examination of issues such as sedimentation stratification and thermal leakage oscillations encountered in the transportation of slush hydrogen. Finally, prospective trends in slush hydrogen technology are addressed with an aim to augment its integration into aerospace applications.

Hydrogen has potential biological effects of promoting seed germination and plant growth. Nevertheless, since hydrogen is highly volatile, it is extremely challengng to coat seeds with hydrogen. Solid-state magnesium-based hydrogen storage material magnesium hydride (MgH₂) could offer reliable hydrogen for seed because of its high hydrogen storage density, rich hydrogen supply by hydrolysis, long-term sustained release, and easy use. This study used a seed coating technology to coat soybeans by MgH₂ and set up the MgO-coated soybean group as a positive control and the un-coated soybean group as a negative control. The effects of different treatments on soybean germination potential, germination rate, germination index and the influence of phenotypic traits, such as aboveground/underground fresh weight, stem length/thickness, total root length, number of lateral roots and leaf area of seedlings, were comprehensively investigated. Results showed that the promotion effects of different coating treatments on soybean germination and seedling growth were in the order: non-coating group 2 coating group. Comprehensive analysis was conducted using SPSS, and results suggested that the MgH₂-L₃ coated soybean group exhibited the highest comprehensive score and was thus the best coating recipe. Such optimal germination and growth performance of soybeans by MgH₂-coatings may be attributed to the synergistic biological effects of both magnesium and hydrogen released by hydrolysis of MgH₂.