这一张才是春莹同志提及一百多年之前 ——
1860年代美国南卡罗莱纳州摘棉花黑奴收工回家照片
https://www.nytimes.com/2017/03/14/
magazine/a-photograph-never-stands-
alone.html
https://blog.creaders.net/uindex.php
https://twitter.com/junzhan12743255
https://twitter.com/lazydjay/status/1375532993612222464
http://www.xilu.com/20210326/1000010001168603.html