Abstract: Although the Chinese language lacks of certain syntactic conditions, the maintaining of agreement in number among an event’s arguments is also necessary in semantics. There must be the same performance for event arguments and obligatory arguments. The dispensable arguments must not have less number entities than the obligatory ones. The explanation of its mechanism needs a way of an entity’s participation in an event. It should be divided into two aspects: an internal way that involves an integral event or a gradual event, and external way that involves events of the same time or events of different times. The way of an entity’s participation proves the generality of the hypothesis of agreement in number.

Key words: agreement in number, minimal quantity, way of an entity&rsquo, s participation in an event