The development of foreign-invested economy and the economy of Hong Kong, Macao and Taiwan within a certain range is of great significance for strengthening China's modernization. It can make up for the relative shortage of China's funds and build a number of urgently needed projects in the national economy; it can introduce advanced technology and scientific management methods to improve China's production technology and economic management level; it can increase national and local fiscal revenue and accumulate construction funds; it can also expand employment, improve people's living standards, expand exports, increase foreign exchange income, etc. What is the central idea of ​​this passage? ["Developing foreign investment economy and Hong Kong, Macao and Taiwan investment economy within a certain range can improve people's living standards.", 'Developing foreign investment economy and Hong Kong, Macao and Taiwan investment economy within a certain range can increase fiscal revenue.', "Developing foreign investment economy and Hong Kong, Macao and Taiwan investment economy within a certain range is of great significance for accelerating China's modernization.", 'Development of foreign investment economy and Hong Kong, Macao and Taiwan investment economy within a certain range can increase construction funds.']