[yuán míng biē yìng]   

鼋    鸣    鳖    应    比喻互相感应，一倡一和。

鼋鸣鳖应，成语，释义为鼋一叫，鳖就答应，比喻同类互相感应，声气相通，出自 《后汉书·张衡传》。

The king and his ministers united all efforts for a common purpose

鼋鸣鳖应