The Yongkang, Tiantai and Qujiang Groups are the synchronous heteropic accumulation during the late Early Cretaceous to the Late Cretaceous, and it is impossible for them to overlap each other.

• 永康群、天台群和衢江群是早白垩世晚期至晚白垩世时期的同期异相堆积，不存在相互叠覆关系。