South Korean coast guard intercepted Chinese fishing vessels according to the Australia Station Intelligence Summary dated 1 February 1956

An item reported that a South Korean coastguard cutter on Christmas morning 1955 intercepted 14 Chinese Communist fishing vessels off the South Korean coastline apparently within the Rhee Line fishing. One fishing boat was captured and taken on tow with 4 coast guards on board. Six armed Chinese vessels attacked the cutter en recaptured the fishing boat. There was no Allied support for counter-measures afterwards.

Source

Website Royal Australian Navy, Sea Power Centre.