https://www.globalsecurity.org/military/world/china/plaaf-boat.htm
The Air Force has a "sea battle team", usually referred to as the Air Force Boat Unit.
The main task of this unit was to transport fuel and other materials to the Air Force on the domestic river channel.
The focus of the Air Force Boating Force has been mainly on the water transportation of aviation fuels, especially the use of the Yangtze River Channel.
It is necessary to transport oil and materials for the air force along the line, and the transportation volume of water transportation is also higher than that of the land

最初に「中国空軍は油槽船を持っていると聞いたのですが（できればどこで知ったかも提示）それは本当ですか？本当ならどういう用途で持っているのですか？」と順序立て、画像があればそれも付けて何を聞きたいのか明確にすれば済む話
質問者は質問の文章からしか意図を判断できないので言葉足らずでは何を聞きたいのか判然とせず明確に答えられない