## 2 Literature Review  
In the previous study, [PERSON] [1] and [PERSON] [2] first proposed using the Revealed Comparative Advantage Index (abbreviated as RCA index) and diamond model to analyze the international competitiveness of the industry. After that, scholars began to study the international competitiveness of different industries with the help of various evaluation indexes and econometric models [3; 4; 5; 6; 7; 8]. Scholars' studies have continuously improved the theoretical system of international competitiveness. However, there are few results on the international competitiveness of computer information service industry at present. These studies mainly include the following two categories. The first category is to measure the industry's international competitiveness with the help of various evaluation indexes. For instance, [PERSON] [9] used import and export data to evaluate the trade structure and international competitiveness of computer information services in the United States and used the model to predict the trade potential of cooperating countries. In addition, [PERSON] and [PERSON] [10] analyzed the international competitiveness of computer information service trade of BRIC (Brazil, Russia, India, and China) countries with the help of the RCA index and put forward suggestions for internal cooperation. They suggested that the scientific and technological cooperation of the BRIC countries in the field of ICT service trade should be included in the national policy priority list, and the research results should be further commercialized. Further, with the help of TC, RCA, and NRCA indexes, [PERSON] [11] evaluated the international competitiveness  
Figure 1: World export of computer information services (Unit: 100 million U.S. dollars). Source: the official websites of WTO. of computer information service trade between China and ASEAN countries and put forward some suggestions from the aspects of strengthening infrastructure construction and promoting differentiated cooperation. The second category is to study the factors that affect the industry's international competitiveness from qualitative and quantitative perspectives. [PERSON] and [PERSON] [12] followed this perspective by using the diamond model to conduct an empirical study on the factors affecting the international competitiveness of computer information service trade among China, Japan, and Korea. The result showed that domestic market demand and trade openness were the two most important factors influencing the three countries. Besides that, [PERSON] [13] constructed a regression model based on diamond theory to analyze the influence of different indicators on the international competitiveness of China's computer information service trade. The analysis result showed that knowledge resources and demand levels were the main influencing factors, and human resources were additional factors. [PERSON] recommended increasing investment in R&D and education, accelerating the training of industrial talents, and learning from other countries' advanced experience. Further, [PERSON] and [PERSON] [14] used the co-integration equation to make an empirical analysis of the factors affecting the international competitiveness of China's ICT industry from the aspects of competitive strength, competitive potential, and competitive environment. This analysis revealed that technological innovation factors have the most significant positive impact on the international competitiveness of the ICT industry, and the number of companies and foreign direct investment have adverse effects on the international competitiveness of the ICT industry to varying degrees. In addition, [PERSON] and [PERSON] [15] empirically analyzed the impact of the development of the computer information service industry and other service trade industries on their international competitiveness with the help of panel data from 49 countries.