谦恭下士

Explanation: Old refers to the VIPs on the status is not high but there are virtuous people humble and polite. 　　Usage: Joint type; as predicate, attributive; with a compliment 　　Source: "Chen Shu Siheung Wang Bomao Biography": "Bo-mao of the intelligent, studious, humble corporal." 　　Examples: He personally delivered the car and shut the door on behalf of himself, line a deep bow and do, pretty well ~. (Fen "trouble in mind rest of his life in exile.")