Why did the mongols employ foreigners rathere than Cinese in high govrnment office?

The Mongols employed foreigners rather than Chinese in high government offices primarily to prevent the assimilation of power and maintain control over their newly conquered territories. They believed that foreigners were less likely to have local loyalties and could be more easily trusted to implement Mongol policies. Additionally, the Mongols sought to promote a meritocratic system, selecting individuals based on ability rather than ethnicity, which often led them to favor skilled foreigners. This approach also helped to mitigate resistance from the Chinese bureaucracy, which could have posed a threat to Mongol rule.