In such an era where everything depends on manpower, it is very difficult to complete the communication work.
The only way for them to pass the message is to rush the horse and use the fastest horse to run the farthest road.
As for the biography of flying pigeons, etc., there is no such thing as a pigeon, and there is no such thing as a pigeon.
In other words, although there are pigeons at this moment, no one can pass him and this
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