第三方的参与可以是受原谈判双方任何一方的邀请，也可以不受任何人的邀请。

The participation of a third party can be at the invitation of either party to the original negotiation or not at the invitation of anyone. In formal negotiations, the appearance of a third party generally requires a formal invitation. Of course, the form of invitation can be written or oral. In daily life, such as when bargaining is possible, many third parties are not invited to join. On other occasions where disputes occur, it is common for people to "draw one's sword and help each other when the road sees injustice."

The participation of a third party may be at the invitation of neither party to the original negotiation or by any person. In formal negotiations, the appearance of third parties generally requires a formal invitation, of course, the form of the invitation can be written or oral. In daily life, for example, in a bargainable situation, many third parties are not invited to join. In other disputes, "road uneven knife to help" is also common.

The participation of the third party may be invited by either party of the original negotiation or not by anyone. In the formal negotiation situation, the appearance of the third party generally requires a formal invitation. Of course, the invitation can be written or oral. In daily life, for example, when bargaining is possible, many third parties are not invited to join. In other occasions of dispute, it is also common for people to "pull a knife when they see injustice".<br>