Cultures that do not have a lot of natural resources love to use natural elements in association with their products. It is refreshing to view such an ad in the concrete depths of the subway. The image takes us away to a cleaner, clearer, elevated place in this world than where we are right now. This is a culture, which practices Buddhism. Buddha gained his enlightenment under a tree.
Trees are symbols of personal solitude and source of edification for the mind and spirit.
I thought I'd show you one ad from above the ground that looks under it. The advertising industry has become a part of the architecture of Hong Kong. This billboard is just about the size of a bus and sits very low to the pedestrian. It was mindfully placed to miss passing traffic that potentially would obstruct its view, even accounting for the two tier buses that frequent by. As you see, she has her head in the sand on this subject.