How do spies and agents collect information?

To put it simply, maybe the ugly people around you are spies or agents, and there are only a few channels for them to get information, which is nothing mysterious:

1, using the convenience of work to obtain, for example, the protagonist in "Hidden" relies on the internal work of the enemy to obtain information;

2, buy, the United States and Russia have bought off the personnel of the other party's confidential department, which is generally applicable;

3, eavesdropping, whether it is a bug or eavesdropping on telephone recordings, are enduring tricks;

4. Get close to the enemy who has information through various means, and then get information through conversation or other means. Generally, female spies often use this trick with their own hue, and male spies can also master it flexibly;

5. Steal directly, such as hacking into the target network, or sneaking into the confidential department to steal or take photos directly.

The above five moves are basically the main means of agents. Of course, the specific way to achieve it is to let a hundred flowers blossom and be creative, but this is the general direction.