do i need to have bridging visa B before applying for tourist visa to China or can i apply on bridging visa A?

As an foreign passport holders in Australia, you should provide valid Australian visa as well as entry record, both the original and the copy. But if you are in Australia free of visa or with ETA and electronic visa, Australian entry record should be provided, both the original and the copy. On some special occasions, International Movement Record or evidence in other forms released by DIAC might be required by the Consulate General.