Shenzhen River (the border btw Hong Kong and Shenzhen), and the Second Line of Shenzhen Special Economic Zone (the border between Socialism China and Capitalism China) were compared to the Berlin Wall. The Second Line were constructed June 1982, demolished June 2015. The First Line (Shenzhen River) still flows, running deeper and deeper after 1997. Artist Miaoyuan LONG and Zen LU (the ON/OFF media Group) documented major checkpoints along these two boundaries. It’s a piece to illustrate the Big Escape (Touch Base Policy) from mainland China to Hong Kong during 1950-70’s and the geopolitical history of Shenzhen. The 48min audio-visual live performance version was Official selection of Draft Systems 2017 WRO Media Art Biennale, Poland.