Chinese flying boats sighted at Tsingtao according to the Australia Station Intelligence Summary dated 1 April 1956

An item reported that totally 5 flying boats were seen at Tsingtao similar to the appearance of the US Martin Marines. They were located at a locally old Japanese flying boat base . In January was one flying boat see above Shanghai probably on behalf of long-range maritime training for the naval air personal.

Source

Website Royal Australian Navy, Sea Power Centre.