A strategy of hiding a plan, usually evil plan but it could also be a good plan, behind the smiles and good behavior to your opponent even if you really hate that. It means that you have to be trusted 100% by your opponent first, then you can finish your opponent without mercy.

If your opponent so strong, you should be able to pretend to obey him. Do not ever against his orders. Pretending is uncomfortable, but this must be done to achieve your goals. And usually you are required to fully comply and you must be willing to carry out all orders and wishes. And if you do not agree, you should not show your disapproval to your opponent, so you quickly can be trusted by your opponent. Yes, you are required to be an obedient servant to his employer.

This action is very important to know where your opponent's weaknesses. Once you have fully trusted by your opponent, you can take the next step that you want. And you will easily finish your mission whenever you want, because you have already know where the strengths and weaknesses of your opponent.

But it can also happen the opposite, that your opponent is doing that to you. To prevent this, you should investigate his background. And do not let your opponent know your weaknesses. However, perhaps if your opponent is very good at hiding the secret, it will be very difficult for you to know clearly, whether he would make an evil plan to you.
All you have to do is stay alert at all the time.

This strategy can also be interpreted in a positive form, for example if your child wants something dangerous, you should perform a soft approach with clear explanations, not by yelling or slapping directly, because your child still can not distinguish between dangerous and harmless.