Research on the development of China's trade in services under the measurements of trade in value-added 并列题名：Research on the development of China's trade in services under the measurements of trade in value-added Research on the development of China's housing market in the process of urbanization Research on export development of China's goods and services trade from the perspective of intellectual property protection Research on the development of China's trade in creative products Research on the development of radio and TV media in China under the background of media convergence Research on the development of China's trade facilitation and the transformation and upgrading of export development model Research on the development of Chinese energetic culture in the new time Research on the development of high-end service industry in BeiJing Research on the digital development of China's new energy vehicle industry under the background of carbon neutrality