Microgravity science is an important branch of space science. To some extent, its frontier projects reflect the ability of human beings to understand nature and the research levels of various countries in this field. Under the extreme physical condition of microgravity, it is pregnant with the prospects of the discovery of new phenomena and laws in physical and chemical processes and material preparation, as well as the realization of the test and the verification of basic physical laws with higher precision. In this paper, the most important research progress of microgravity science in recent years is reviewed.

进入21世纪，现代科学技术迅猛发展，神经外科领域基于神经网络科学和数字化脑成像技术的神经调控领域，将神经外科学推向神经网络外科（neural networks surgery）新的阶段。神经网络外科不仅为难治性神经系统疾患提供了更安全可靠的方法，同时也为神经外科学开启一扇通往脑科学研究大门^[1-2]。

中共中央政治局2016年10月9日就网络强国战略进行了第三十六次集体学习。习近平总书记强调，网络信息技术是全球研发投入最集中、创新最活跃、应用最广泛、辐射带动作用最大的技术创新领域，是全球技术创新的竞争高地。我们要顺应这一趋势，大力发展核心技术，加强关键信息基础设施安全保障，完善网络治理体系。要紧紧牵住核心技术自主创新这个“牛鼻子”，实施网络信息领域核心技术设备攻坚战略，推动数字技术如高性能计算、移动通信、量子通信、核心芯片、操作系统等研发和应用取得重大突破。2020年2月16日，习近平总书记在《求是》杂志上发表重要文章，要求“加快释放新兴消费潜力，积极丰富5G技术应用场景”。5G移动通信技术和应用已上升到国家层面，将在数字经济社会中发挥越来越重要的作用。

随着人类社会的发展，很早就已经有了对“计量工作”（古时称为“度量衡”）的要求，如“丈量各种物品的大小（包括丈量土地）”“称量物品的轻重”等。但当时对“计量工作”的管理主要是行政方面，科技含量并不高。

水是生命之源、生产之要、生态之基，水资源关系到生态安全、经济社会安全以及国家安全。随着中国工业化和城镇化的全面推进，水资源短缺、水环境污染、水生态退化、次生水灾害突出等一系列水环境和水生态问题给我国水安全保障带来了诸多挑战。与此同时，全球性气候变暖带来的譬如水资源量及空间分布变化等多方面与综合性的不利影响，进一步导致中国的水生态问题加剧。

癌症是威胁我国人民健康最主要的慢性非传染性疾病，国家癌症中心发布的《2015年中国恶性肿瘤流行情况分析》报告显示，中国2015年新发恶性肿瘤病例约392.9万例、死亡病例约233.8万例。中国的癌症谱呈现发达国家与发展中国家癌症谱共存的局面，癌症防控形势严峻，加强癌症综合防控和抗癌新药研发可以有效改善癌症患者预后。

The integrative development of humanistic nursing care with modern technology calls for breakthroughs and investigations in terms of talent cultivation and technical collaboration. With the change of global demographics/environment and with the emergence of the covid-19 pandemic, we are in a great need for nurses more than ever. Their knowledge and capabilities acquired through years of education and practice are promoting the integrative development of humanistic nursing care with modern technology. The ultimate goal is to serve the entire human life cycle with humanistic nursing care infused with the strongest modern technology.

At the beginning of the founding of the People's Republic of China, more than 2000 overseas Chinese science and technology professionals returned to China, becoming the backbones in China's scientific and technological development. The return of science and technology professionals involves troubles and obstacles and is of far-reaching significance. This group is the most shining group in the history of students studying abroad later working in China, and becomes a model for Chinese intellectuals seeking the way to serve the country with knowledge of science and technology in the contemporary China. Through a historical review of the process of the returning trend in the 1950s, their motivation and experiences of returning, the significant work they did after returning to China, the scientific spirit and feelings for the home and the country are shown.

The scientific and technological professionals are an important innovative and developing power in the framework of the national strategy. Their mental health is vital to ensure their creativity and productivity. To study the mental health state and the risk/protective factors among Chinese scientific and technological professionals, a large survey with over 10,000 samples is conducted in 2019. It is shown that:over 1/5 scientific and technological professionals have depressive symptoms, 10.6% have the suicide ideation in the past year, and 55.5% suffer varying degrees of anxiety, about 8.8% and 4.5% of the professionals have moderate and sever anxieties, respectively. Male professionals have higher level of depression than the female professionals. The young and middle aged professionals have higher level of depression and anxiety than the elder ones. The professionals with middle-level professional titles or without titles have the highest level of depression and anxiety and the higher the titles, the less the risk of suicide ideation. More research professionals have depression than the support and manage professionals; the work stress, and the life stress, such as the financial strain and some stress related to family member issues are the risk factors of the scientific and technological professionals. Meanwhile, the support from colleagues and leaders, the better emotional regulation ability and strategies, the environmental adaption, the coping ability, the better psychical health and more frequent exercise are the protective factors. Generally, the scientific and technological professionals have mental health needs and would like to accept mental health services, especially, the highly privacy protected ones. However, there are both objective and subjective obstacles, due to the limited service resources and lack of knowledge of mental health services. At present, the mental health services cannot meet the needs of scientific and technological professionals. Therefore, the mental health services should be implemented and strengthened, and the knowledge of mental health should be popularized.

The talent ecological environment is an important factor affecting talents' will to stay. In order to understand the current state of the talent ecological environment in Shanghai and its impact on talents' will to stay, a questionnaire is designed based on a review of literature. The SPASSAU statistical software is used to analyze the survey data. It is shown that:talents with different demographic characteristics have different levels of the five talent ecological environmental factors; there are significant differences in the will to stay among the talents of different genders, professional titles, positions and disciplines; and the economic environment, the living environment, the cultural environment, the policy environment have a positive and significant impact on the talents' will to stay, among which the policy environment has the greatest impact. This research indicates that when the basic living needs and spiritual needs of talents are satisfied, Shanghai talent policy should adopt different policy standards to meet the different needs of different talents.