Hong Kong's June 4 vigil will also support mainland Chinese arrested for supporting Occupy
South China Morning Post, May 21, 2015
http://www.scmp.com/news/hong-kong/politics/article/1804755/hong-kongs-june-4-vigil-will-also-support-mainland-chinese
Beijing official rules out any changes to 2017 election reform framework
South China Morning Post, May 21, 2015
http://www.scmp.com/news/hong-kong/politics/article/1804769/beijing-official-rules-out-any-changes-2017-election-reform
Votes switch still on cards, claims Tang
HK Standard, May 21, 2015
http://www.thestandard.com.hk/news_detail.asp?pp_cat=11&art_id=157216&sid=44510704&con_type=1&d_str=20150521
Beijing's door is open for talks, says Zhang
Radio Television Hong Kong, May 20, 2015
http://rthk.hk/rthk/news/englishnews/20150520/news_20150520_56_1101017.htm