On May 10, 2022, Prof. Fang Liu was invited to give an invited report at the ACS Photonics in China online summit. The title of the report was "Free electron radiation generated with micro-& nano-structures", and introduced the free electron radiation technology based on micro-nano structure.

In order to sincerely thank the authors, readers and reviewers of ACS Photonics and have in-depth exchanges with them, Prof. Romain Quidant, the editor-in-chief of ACS Photonics, associate editor, Professor Yidong Huang and Nar Liu from the University of Stuttgart joined to invite Prof. Limin Tong from Zhejiang University, Prof. Fang Liu from Tsinghua University, Prof. Lingling Huang from Beijing Institute of Technology, and Prof. Shuang Zhang from the University of Hong Kong, brought a wonderful online academic feast. There are more than 2000 researchers and practitioners from around the world attracted the summit.