一身而二任

Explanation: Take one of two tasks. 　　Usage: Complex sentence; as predicate; means a person to bear two kinds of tasks 　　Source: "Han Ji-Chuan," pro-princes flesh Mo King, King is the son also was in place the minister also, one and two the responsibility of any added Yan. " 　　Examples: ~ Yan, although Holy also not available. ★ Han Yu "masonry were Chengfu" Thesaurus:  Shenjianshuzhi