there that there s a certain line that is not to be crossed? reporter: there is worry, not just from today, but i think over the past two years since the occupy umbrella movement to 2014. and more recently the detention of a number of book sellers who published books deeply critical of the chinese government. these men, five of them, were suddenly discovered across the border in china. moments like that have raised questions about the future of democratic freedoms here in hong kong. there s other anxiety as well. concern about and here the skies are starting to open up with the rain coming down, and the umbrellas which are everyday utensils and tools here in hong kong. but also a symbol of that umbrella movement, the protest movement of 2014. but part of the anxiety is