两 全 其 美

Traditional兩全其美

to satisfy rival demands (idiom)
to get the best of both worlds
to have it both ways
to have one's cake and eat it too

“serve a twofold purpose; satisfy both parties”

指做一件事顾全到双方，使两方面都得到好处。

Origin 元·无名氏《连环计》第三折：“司徒，你若肯与了我呵，堪可两全其美也。”

Example 土霸打倒，穷苦人见青天。不是～！（梁斌《红旗谱》十八）