【師蒔史識：近代中國外交史研究】巴黎和會與中國外交(三)：山東問題、外交失敗與五四運動 China and Paris Peace Conference

Round-14 hunt: picked; source: named-course long-video search (r14, wave 2); channel screens (sellers/exam/re-upload/devotional/vendor/events), provenance check, vendor/seller/devotional recheck and quality tier A passed; strict per-title check + final strict pass; oEmbed verified.