2020 is a tough and challenging year for all the world. Nearly all the labs are impacted by the COVID-19. During the difficult time, lab of C-UFO actively held online learning meetings to improve the capabilities of teachers and students, while working together to fight the COVID-19. For example, we invited many great scientists, such as Prof. Shining Zhu, Prof. Dinping Tsai, Prof. Xinxin Li, Prof. Min Gu, Prof. Xianfeng Chen and so on, to introduce the frontal progresses in different scientific fields. In addition, the series of meetings of "Skills and Trainings of Practical Research Tools" are welcomed by students. For example, Prof. Yonglai Zhang shared the skills to write a review paper; Prof. Yonglai Zhang and Dongdong Han shared the skills of drawing beautiful pictures using AI and PPT; Prof. Xulin Zhang shared the basic techniques and advanced experiences of MATLAB, which makes students can solve equations and draw various pictures; Dr. Zhenze Li shared the basics and skills to use LaTeX; Also, we invited Prof. Linlin Han and Honghua Fang from Tsinghua University to share their experiences on the management of literatures using Endnote and Mendeley, and so on. Such kinds of meetings will be held continuously. We hope everyone in lab of C-UFO can handle these tools and skills and thus paves their way to scientific researches.