According to VOA, on Sunday, November 9, a member of Scholarism, a Hong Kong student association, was denied entry into Shen Zhen, a border city next to Hong Kong. Since the member carried winter clothes and a yellow umbrella in his luggage, he was accused of conspiracy to go to Beijing for the umbrella movement. Just a couple of days earlier, on November 7, another low key Scholarism member, who used to travel between the mainland and Hong Kong, was denied entry when he tried to meet a friend in Shen Zhen. The article expressed the belief that the tightened security was related to the upcoming week long APEC meeting to be held in Beijing starting on Monday. The article also expressed concern that the mainland has put forth much effort to collect information on those who were involved in the occupy central movement and has since compiled an extensive blacklist.
Source: VOA, November 9, 2014