China cracks down on 'thousands' of petitioners ahead of party congress
Radio Free Asia, October 3, 2017
http://www.rfa.org/english/news/china/petitioners-10032017113904.html
Related:
十九大「護城河」 嚴防訪民上京 (Activists stopped from visiting Beijing before nineteenth congress)
Mingpao, October 4, 2017
https://news.mingpao.com/pns/dailynews/web_tc/article/20171004/s00013/1507053552971