The outbreak of the COVID-19 virus has given the world a heavy punch in 2020. The growth infection over 30 countries in the world has seen the overwhelming power of the exponential spread of COVID-19 at the early stage. The White House Office of Science and Technology Policy (OSTP) pulled together a coalition research groups and companies (including Kaggle) to prepare the COVID-19 Open Research Dataset (CORD-19) to attempt to address key open scientific questions on COVID-19. Those questions are drawn from National Academies of Sciences, Engineering, and Medicine’s (NASEM) and the World Health Organization (WHO). Flooded by the daily news of how serious the pandemic becomes, I am wondering whether and to what extent the government can stop the pandemic. Specifically, if the government takes a fast response to restrict social activities, will the pandemic be stopped at an early stage? Thus, I took part in one of the competition and built an individual-based virus spread model in which I considered how the speed of the government reaction affects pandemic development. It is an one-week competition that finished in this morning. I create this post by attaching my work here. Enjoy!