Research on the international legal system of diplomatic protection 并列题名:Research on the international legal system of diplomatic protection Research on the legal system of cultivated land protection Research on the trend of international copyright system and China's selection Research on the legal system of reorganization research on the international commercial arbitration consensus research on the innovation of the parallel system of position and rank Rearch on the international legal system for the safeguarding of intangible cultural heritage research on the sex ratio at birth of the minority population research on the victim's right of action in public prosecution