管鲍之交，指的是管子和鲍叔牙之间的深厚友谊。管子和鲍叔牙都是战国时期的著名思想家和政治家，二人相识相交，共同探讨国家治理和人生哲学，成为历史上著名的交友典范。

翻译：The term 'guan bao zhi jiao' refers to the deep friendship between Guan Zhong and Bao Shuya. Both Guan Zhong and Bao Shuya were famous philosophers and politicians in the Warring States period. They met and became friends, discussing state governance and life philosophy, becoming a famous model of friendship in history.