群策群力（羣策羣力）　

◎ 群策群力 qúncè-qúnlì

[brainstorm;by collective wisdom and efforts;pool the wisdom and efforts of the masses;pool all the brains and brawn for the job] 群众的智谋和力量

实赖同心同德之臣,亟合群策群力之助。——宋· 陈元晋《见郑参政启》