It's #doublefoundationday in #ChineseHistory: in 266, Cao Huang 曹璜 (246–302) of Wei 魏 cedes the throne to Sima Yan 司馬炎/ Jin Wudi 晉武帝, 236–90; in 960, Guo Zongxun 郭宗訓 (953–73) of Zhou 周 abdicates in favour of Zhao Kuangyin 趙匡胤/ Song Taizu 宋太祖, 927–76. #禪讓 #otd