What are the methods of transmitting information from ancient times to the present?

The ancient method of transmitting information:

1. Use migratory birds, especially pigeons and geese, as communication tools.

2. the way to make stuffing, such as hiding in fish belly, cake, steamed bread, etc.

There are special sounds, such as bells, drums and firecrackers.

4. Use lights and firelight, such as Kongming lanterns, beacon towers and wolf smoke.

5. There are other signs and decorations. , and other signs to lure the enemy.

Modern methods of transmitting information:

1. Wired communication transmission, such as telephone, fax, telegram, television, etc.

2. Wireless communication transmission, such as walkie-talkies, pagers (obsolete), mobile phones and radios.

3. Digital communication transmission, the most familiar, networked computers, digital TV.

4. Paper communication transmission, such as letters and newspapers.