During the series of protests against the China-Extradition bill beginning on 9 June, the original Lennon Wall has been once again set up in front of the Hong Kong Central Government Offices staircase. During the months of June and July, Lennon Walls with similar encouraging messages written on post-it notes and regular paper have been put up throughout the entire Hong Kong. This is referred to as "blossoming everywhere" (遍地開花).
This is an open source project dedicated to Hong Kong citizens against the tyranny of hk government during the anti-extradition bill protest. You are welcome the download the source code and create your own Lennon Wall app at https://github.com/goatman/LennonWallHK