Complex sentence: Once "foreign" dynasties like the Mongol Yuan and the Manchu Qing can be appreciated as part of the Chinese tapestry, allegedly helping reduce the alienation of ethnic minorities living in China.
Split into simpler sentences: Once "foreign" dynasties like the Mongol Yuan and the Manchu Qing can be appreciated as part of the Chinese tapestry. This would allegedly help reduce the alienation of ethnic minorities living in China.