China has detected 24 imported cases of a new Omicron variant - CH.1.1. Beijing will soon carry out a survey to measure COVID-19 antibody levels across its population to assess the pandemic in the capital and refine its virus control strategy. A Chinese doctor shares his story in fighting COVID-19 over the past three years. How transmissible is the new variant? What should we do to better protect ourselves from infection as COVID-19 remains a global public health emergency? How did doctors in China fight the virus over the past three years?