遥呼相应 distant calls and responses
Explanation
指远远地互相呼应、互相配合。多用于军事或政治活动中，形容双方默契配合，行动一致。
Refers to the far-off mutual response and mutual cooperation. It is mostly used in military or political activities to describe the tacit cooperation and consistent actions of both sides.
Origin Story
话说当年秦始皇统一六国后，为了巩固统治，派遣大将蒙恬北击匈奴，修筑万里长城。蒙恬率领大军在边境严阵以待，匈奴人却采用了游击战术，来回骚扰，企图消耗秦军的兵力。蒙恬虽然久经沙场，但也一时难以应对。这时，一位年轻的军师献计说：‘我们可以利用长城烽火台进行遥呼相应，一旦发现匈奴骑兵，立即点燃烽火台，沿线烽火台依次传递，迅速集结大军，打敌人一个措手不及。’蒙恬采纳了军师的建议，在长城沿线设置了完善的烽火传递系统。从此，匈奴人的游击战术屡屡受挫，秦军也因此稳固了北方的防线。他们之间，实现了真正的遥呼相应，取得了最终的胜利。
After Qin Shi Huang unified the six states, in order to consolidate his rule, he sent the general Meng Tian to attack the Xiongnu in the north and build the Great Wall of ten thousand miles. Meng Tian led a large army at the border, waiting for the Xiongnu, but the Xiongnu used guerrilla tactics, repeatedly harassing them in an attempt to exhaust the Qin army's strength. Although Meng Tian had extensive experience in war, he was initially unable to cope. At this time, a young military strategist suggested: 'We can use the beacon towers along the Great Wall for mutual support. Once we spot Xiongnu cavalry, immediately light the beacon towers, and the beacon towers along the line will transmit it in turn to quickly assemble a large army and take the enemy by surprise.' Meng Tian adopted the military strategist's suggestion and set up a complete beacon transmission system along the Great Wall. From then on, the Xiongnu's guerrilla tactics repeatedly failed, and the Qin army thus secured its northern border. They achieved true mutual support and achieved final victory.
Usage
用于形容双方或多方行动协调一致，互相配合，共同完成任务。
Used to describe that both sides or multiple sides are coordinated and consistent in their actions to complete tasks together.
Examples
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两军对垒，遥呼相应，气势汹汹。
liǎngjūn duìlěi, yáohū xiāngyìng, qìshì xīngxīng.
The two armies faced each other, calling to each other from afar, with fierce momentum.
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南北两地文化交流频繁，遥呼相应，共同发展。
nánběi liǎngdì wénhuà jiāoliú pínfán, yáohū xiāngyìng, gòngtóng fāzhǎn.
Cultural exchanges between the north and south are frequent, responding to each other, and developing together.