Picture
Bronze ice container (bingjian) of the Warring States Period.
Source : http://www.flickr.com/photos/drs2biz/
It happened in the warring States Period. At a banquet of Qin, Lin Xiangru, a senior offical of Zhao, with his wit and bravery, earned much reputation for Zhao . 

In gratitude the king promoted Lin Xiangru to Shangdafu (senior offical in feudal China) and soon to Shangqing, which ranked even higher and equal to Prime Minister.