diff --git a/venus-shared/actors/types/docs.md b/venus-shared/actors/types/docs.md
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+[`venus/venus-shared/actors/builtin/multisig/message.v0.go`](#https://github.com/filecoin-project/venus/blob/master/venus-shared/actors/builtin/multisig/message.v0.go#L27) 需要引用结构体 `Message` 和 [`venus/venus-shared/actors/builtin/init/actor.go`](#https://github.com/filecoin-project/venus/blob/master/venus-shared/actors/builtin/init/actor.go#L41) 需要引用结构体 `Actor`，若把 `Message` 和 `Actor` 定义在 `venus/venus-shared/types` 包中，会导致 `venus/venus-shared/actors` 和 `venus/venus-shared/types` 的**循环引用问题**，所以把一些类型的定义放到了本包中。
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