1. To form an effective contract, the parties must be agreeable, and the agreement is reflected by one party making an offer and the other party accepting it.

2. If the promise of the law is to become a force of exchange, it must be implemented.

There must be a valid contract to support the price of both parties. The definition of price is reached through bargaining and exchange. In other words, those who accept the promise give up something or suffer the damage of the contract in exchange for the promise.

4. A revocable contract can mean the cancellation of the contract, that is, even if the contract constitutes a clear law with value and purpose through agreement, one party can legally cancel it.

There are many reasons why the contract is considered invalid, such as breaking the law, not reducing the price, or one or both parties are incapable. In some cases, the court will rule a legal contract invalid for reasons of public order and good customs.

6. Some defendants who intentionally infringe can prove that the infringement is allowed to file a legal defense.

7. Fraud in violation of defense

8. What is the tort law, and it is considered as a socially acceptable and responsible behavior standard?

9. A contract is an agreement between two parties, and a breach of the agreement by one party constitutes a breach of contract.

10. Giving up personal freedom does not constitute illegal detention.