## 1 Introduction
In addition, the connections between significant events and the stock market have been learned from war, financial, and revolution perspectives [25]. In our research, stock market indices in China were gathered for the experiment due to their importance in the global economy. China plays a vital role in the global financial system as it contributes more than 16% of global GDP industries today, and manufacturing and services now represent 93% of China's GDP [26]. Thus, the impact of the COVID-19 pandemic on the Chinese stock market may present a crash risk [27]. Since 2020, due to the pandemic, China's reduction in production and present restricted transports have slowed global economic activities [28]. The outbreak has also led to heightened uncertainties and substantial increases in volatility in the global economy [29; 2]. There is also statistical evidence of instability being transmitted to all other markets from the Chinese stock market [4]. Here, one thing that needs to be noted is that the US stock seems to act individually. A study investigated the impact of COVID-19 cases and related deaths on the US stock market (Dow Jones and S&P500 indices), and it suggested that changes in the number of cases and deaths in the US and six other countries majorly affected by the COVID crisis do not have an impact on the US stock market returns, apart from the number of reported cases for China [30]. Hence, we expected that VXFXI would behave not the same as other indices from the beginning of our research, even though it is still China-related stocks. Additionally, we collected relevant stock market indices related to China, including CSI Smallcap 500 Index (CSI500), Shanghai Securities Composite Index (SSEC), Compositional Index of Shenzhen Stock Market (SZI), Hang Seng Index (HSI), Taiwan Weighted Index (TWII), and CBOE China ETV volatility (VXFXI). In this article, date descriptions without the year indicate 2020; for the description of countries and regions, China refers to Mainland China; Hong Kong represents Hong Kong, China; Taiwan indicates Taiwan, China; the US indicates the United States. HSI is located in Hong Kong; TWII is in Taiwan, and VXFXI is situated in the US; all others are in China. To the best of our knowledge, most existing studies related to the COVID outbreak and the stock market were processed by focusing on stock data analysis during the pandemic; few of them have been completed from a social perspective or provide a connection between them. This work aimed to analyse the association between COVID events and the stock market index from a noneconomic perspective, and target relationship analytics; it also addressed whether the major social events during the pandemic affected the stock market's fluctuation, hence bridging those two sets of data and extracting deeper insights from the datasets. Our hypotheses are as follows. **Hypothesis 1 (H1). **_There are connections between COVID-19-related social events and the stock market index. The stock indices may be affected by similar events._  
**Hypothesis 2 (H2). **_Relevant public health social events may affect different stock market indices to various degrees. Specifically, the influence of social events might vary based on the stock market's geographical location._  
**Hypothesis 3 (H3). **_Authoritative announcements may play a critical role in affecting the stock market, but the impacts might be restricted according to the authority's jurisdiction scope._  
**Hypothesis 4 (H4). **_It is possible to rank related public health social events of their effects on the stock market based on the connections between events and historical stock index's fluctuations._  
**Hypothesis 5 (H5). **_A visual approach can help readers gain insights effectively and help stakeholders discover patterns._  
The rest of this article is organised into several parts. In Section 2, relevant data and its processing details are given; we also introduce related methods and features involved in experiments. In Section 3, we offer visual results, as well as some overviews.