on 6 and 8 April 2020, we have hosted our first two online seminars due to covid-19. We have attracted at least more than 184 participants in one night alone on 8 April 2020. Apart from full professors from local universities, majority come from the US, the UK, China. Others come from Holland, Australia, South Korea, Singapore, India, Pakistan, South Africa, Nigeria, Sweden, Brazil, Maylaysia, Israel, Serbia, Morocco, and Saudi Arabia. They come from different institutions, such as Cambridge University, University College London, University of Hong Kong, Baptist University, City University of Hong Kong etc.