Government social media is widely used for providing updates to and engaging with the public in the COVID-19 pandemic. While Facebook is one of the popular social media used by governments, there is only a scant of research on this platform. This paper aims to understand how government social media should be used and how its engagement changes in prodromal, acute and chronic stages of the pandemic. We collected 1664 posts and 10,805 comments from the Facebook pages of the Macao government from 1 January to 31 October 2020. Using word frequency and content analysis, the results suggest that the engagement was relatively low at the beginning and then surged in the acute stage, with a decreasing trend in the chronic stage. Information about public health measures maintained their engagement in all stages, whereas the engagement of other information was dropping over time. Government social media can be used for increasing vigilance and awareness in the prodromal stage; disseminating information and increasing transparency in the acute stage; and focusing on mental health support and recovery policies in the chronic stage. Additionally, it can be a tool for controlling rumors, providing regular updates and fostering community cohesion in public health crises.

With “One Center, One Platform” as the strategic goal, Macau’s development has been an essential part of the 12th and the 13th Five-Year Plan. Even though Macau has achieved a great success in development, it encountered bottlenecks, especially urban renewal. This study made a literature review on relevant theories on urban renewal, the development of Macau’s urban renewal policy, and collective efficacy to construct the research questions. The study will base on a household survey in an old region of Macau and make use of quantitative research to examine Macanese choice on urban renewal option. From the results, organizational collective efficacy can be divided into two subscales, namely neighbor-to-neighbor mutually assistance collective efficacy and commercial collective efficacy. For Macanese, the latter has a significant impact on their options on urban renewal, which can explain why downtown areas of Hong Kong succeeded at the beginning of Urban Renewal Authority. It is reasonable for Macau SAR government to actively set up Macau Urban Renewal Company Limited. However, urban renewal stresses more on participation of its residents and cities worldwide, all promoting diversified consultation and development patterns in the hope that different public values can coexist upon urban renewal.