In the process of Pakistan's struggle for national independence in the 1940s,the Sindhi elites actively supported the resolution on partition between India and Pakistan,making important contributions to the founding of an independent Pakistan.However,after the establishment of the state,the Sindhi ethnic group had a profound conflict of interests with the Pakistani government and other ethnic groups on the reform of the state structure,the issue of Muhajir immigrants,and the status of the national language.The Sindhi political elites represented by Ghulam Said advocated ethnic separation as the goal to safeguard the interests of their own ethnic group,and their ethnic separatist ideas and goals were called"Sindhudesh",which then developed into a"Sindhudesh Movement"that manifested itself in extreme nationalism.In recent years,the Sindhi ethnic separatist forces have regrouped in the midst of continuous differentiation and established cross-ethnic cooperation with the Baloch separatist groups.These new trends pose serious challenges to Pakistan's national security and social stability,and certain security risks to the project cooperation under the new phase of the China-Pakistan Economic Corridor.