《史记·三十世家·曹相国世家》
他听说胶西有位盖公，精研黄老学说，就派人带着厚礼把他请来。
闻胶西有盖公，善治黄老言，使人厚币请之。
He heard that there was a person called Gai Gong in Jiaoxi who excelled in the study of Huang Laoism. He sent someone with rich gifts to invite him.