Study of the Hui merchant community of Shanghai in the period of Republic of China Study on the Chinese opera in Shanghai during the early period of Republic of China Study on the revolution of urban road system in xi'an in the period of the republic of china Research on the foreign trade thoughs in the period of Republic of China writings as the general consul of Central Asia in the period of Republic of China Study on theory and practice of social insurance during the period of the republic of China Study on the harm and control of drug in Gansu province during the period of the republic of China Study on the international communication of Chinese during the republic of China 并列题名：Study on the revolution of urban road system in xi'an in the period of the republic of china 并列题名：Study on the Chinese opera in Shanghai during the early period of Republic of China