During the Covid-19 pandemic, Sino-Brazilian relations were affected by the election in January 2019 of Jair Bolsonaro as President of Brazil. Various voices were raised on the topic of Sino-Brazilian relations, with some people believing that the attitude towards China that Bolsonaro held damaged Sino-Brazilian relations to a noticeable degree. However, several studies also suggested that the election of Jair Bolsonaro did not have any negative impact on Sino-Brazilian relations, in the form of actual results. In the post-epidemic era, with the new Brazilian President Luiz Inácio Lula da Silva taking office, Brazil and China’s strategic partnership seems to have been strengthened. Lula not only expressed his friendly attitude towards China after taking office, but also paid a state visit to China from April 12 to 15, 2023. China and Brazil subsequently signed the Joint Statement between the People’s Republic of China and the Federative Republic of Brazil on Deepening the Comprehensive Strategic Partnership. China and Brazil not only continue to cooperate in trade, but have also expanded cooperation in aerospace, electronic technology and other fields. Using Guanxi theory as its theoretical framework, this paper studies China’s attitude and policies towards Brazil during Covid-19 and after the epidemic, from a Chinese perspective. It analyses the different attitudes and policy orientations of Brazilian leaders towards China, as well as China’s responses to ensure the maintenance of Sino-Brazilian relations, discussing the various actions taken.