Guerrilla gardening in Taiwan

I recently saw some interesting pictures showing gardening in limited spaces in Japan. Taiwan also has a fair amount of guerrilla gardening going on. The most common method is to place potted plants in front of one's residence. This is only "guerrilla" because they are placed on the sidewalk and sometimes the street. A second, sneakier method of guerrilla gardening is to pry bricks from out of the sidewalk and to plant plants in those spaces. These pictures show that method. It may sound selfish to make the sidewalk unwalkable, but sidewalks in residential areas here are already unwalkable. There is rarely of a stretch of more than ten yards of unobstructed sidewalk. These photos come from two buildings in the neighborhood.